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Mini Classic Mini Mk1-Mk7
Power hp
Torque Nm
Displacement L
Layout
Swap overview with verified parts, part numbers and sources.
B16A in Classic Mini.
Documented from 25 recorded sources: 5 of the ten mandatory blocks are carried by two independent publishers, 3 remain open, 1 does not apply. Internal confidence 66%.
(1Q) Transverse water-cooled inline-four, aluminium head, DOHC with VTEC on all codes in scope. The B16 family is 1,595 cc, the B18C family 1,797 cc. Compression runs from 10.0:1 on the B18C1 and B18C4 through 10.2 to 10.8:1 on the B16 family to 11.1:1 on the B18C6 and B18C7. VTEC engagement is documented at 5,500 rpm on the 1992-1998 B16A, 6,200 rpm on the B16B, 4,500 rpm on the B18C and B18C1 and 5,900 rpm on the B18C6, which is a useful way to tell what a given engine will feel like in a car this light. Peak-power speeds run from 7,200 to 8,400 rpm. Deliberately absent: bore and stroke, valvetrain drive, engine weight and torque figures - no reachable source gave them for these codes in a form a second publisher confirms, and in a 700-kilogram car the weight figure in particular would have been worth having.
Status: SINGLE_SOURCE · Confidence 50%
Naturally aspirated in every engine code in scope: no reachable source lists factory forced induction for any B16 or B18C variant, and all cited outputs are given without boost. Turbocharged Classic Mini B18 builds do exist - one documented car runs
Buy the donor by gearbox and OBD generation, not by power. Two requirements are stated outright and both narrow the field hard. First, the kit is sold for a 'Honda B Series Engine w/ Manual Transmission' - the conversion has no automatic path. Second, the installation manual states that only OBD1 computers can be used, because the Mini has no vehicle bus for the ECU to talk to and the engine management has to run as a stand-alone system; the same vendor sells a modified OBD1 ECU as part of the package. That makes the OBD1-era engines the straightforward choice: the 1992-1998 JDM B16A and the JDM B18C. OBD2 engines such as the B16B, B18C1, B18C5 and B18C6 are the codes most often on offer in Europe but need either conversion to OBD1 or a stand-alone ECU - one documented Mini runs a Hondata S300 instead. Take engine, manual transaxle, engine harness and ECU as one set, and plan on either the donor's own engine and transmission mounts or those of a 1992-1995 EG Civic or 1994-2001 DC Integra.
The shopping list splits in three. From the Honda donor: engine, manual transaxle, engine and ECU harness, ECU, and the stock engine and transmission mounts (12 mm bolts), plus a 1992-1998 Civic radiator if the parts-bin cooling route is taken; a 1992-1995 EG Civic or 1994-2001 DC Integra also serves as a mount source. Buy as conversion hardware, one coherent system and not mixed between manufacturers: the subframe with its arms (3,502.90 USD for the MTB2 route, 7,400.00 GBP for the T45 route), the hybrid Mini/Honda chromoly driveshafts, and - on the MTB2 route - the individually numbered coilovers MT511210, radiator MT530600, wiring kit MT250410, chipped ECU MT250200, brake conversion MT351100, big brake kit MT310000, driveshafts MTmini-B1, pedal kit MT322000 and intake hose kit MTVEN103, plus the RHD steering conversion MT351200 for a right-hand-drive car. Source yourself: fuel pump of 32 to 48 PSI with a return line, the complete exhaust, the shifter linkage material, and wheels with the required offset. All prices as of 31 July 2026.
Status: SUPPORTED · Confidence 72%
There are no engine mounts in the usual sense: the complete front subframe is replaced, and with it the engine mounting, the front suspension and the steering carrier. Two independent manufacturers offer that subframe with different designs. One supplies the MTB2 subframe with adjustable upper and lower arms at 3,502.90 USD, and its manual is explicit about what the car loses first - remove the stock engine and subframe, then everything else in the engine compartment, cut and remove both inner fenders, cut out the metal just below the stock shock mount, remove excess metal behind the grille, and cut a marked section of the bulkhead so the alternator pulley clears. Engine and transmission are then carried on the donor Honda's own stock mounts using 12 mm bolts. The other manufacturer builds an aircraft-grade T45 tubular subframe with billet 70A engine mounts and widens the track by three inches per side, at 7,400.00 GBP. A documented 1969 Mini uses the first system with new lower suspension arms. This is body cutting, not bolting: the kit's own manual calls the result 'For off road use only!'. All prices quoted in this field are as of 31 July 2026.
No reliable combination-specific information found on oil pan, oil pump, pickup tube or ground clearance in this combination.
The Honda manual transaxle comes with the engine and is mandatory - the kit is sold for a 'Honda B Series Engine w/ Manual Transmission' and no other route is offered. The installation manual pairs transmission codes to engines rather than leaving it open: against the B16A alone it names S1, J1, Y1, A1, YS1 and S4C, and it lists the B18C as a five-speed. The Mini's own four-speed, which lives in the sump under the A-series, is discarded with the engine and the subframe. Neither manufacturer includes a gearbox; both expect the builder to bring the donor's. No reachable source gave ratios, final drives, torque capacity or a recommendation between the listed codes.
The transaxle hangs on the donor Honda's own stock transmission mount using a 12 mm bolt, and the kit adds a rear transmission stabiliser to the subframe (1Q). That is the entire documented specification. Nothing was found on the mount's position relative to the subframe, on bushing choice, on preload or on what the stabiliser attaches to at its other end.
Status: SINGLE_SOURCE · Confidence 46%
The shift linkage is rebuilt from scratch, and the manual describes it as fabrication rather than fitting: cut all four ends off the shifter linkage, hang the shifter in the stock Mini location and drill new holes for it, hang the shifter ends on the transmission, then rebuild the connection from three-quarter inch metal pipe, bending and welding it so that every gear can be selected without the linkage hitting the body, using shifter rod reducers at the joints. The kit vendor separately lists the shift linkage among the required modifications that are not supplied, and the other manufacturer states that the shifter is not included and must be sourced. No dimensions, no bend angles and no finished example are published.
Status: SUPPORTED · Confidence 64%
No reliable combination-specific information found on clutch, pressure plate, flywheel, release system or clutch actuation in this combination.
Status: OPEN
No combination-specific automatic transmission solution documented.
Status: NOT_APPLICABLE
No combination-specific automatic transmission solution documented.
Status: NOT_APPLICABLE
No combination-specific automatic transmission solution documented.
Status: NOT_APPLICABLE
No combination-specific automatic transmission solution documented.
Status: NOT_APPLICABLE
No combination-specific automatic transmission solution documented.
Status: NOT_APPLICABLE
There is no propeller shaft; the drive goes through two front driveshafts, and these are the one component that cannot come from either donor. Both manufacturers supply purpose-made shafts and both build them as hybrids: the MTB2 kit includes two Mini/Honda chromoly axle shafts rated by the vendor at 400 hp, assembled with the complete OUTER Mini CV joint assembly at the wheel end and the complete INNER Honda CV joint assembly at the gearbox end, with the Honda race driven onto the shaft with a hammer and socket and the supplied gear fitted at the small end. The other manufacturer supplies billet shafts of equal length with a lifetime warranty, specifically to reduce torque steer. No lengths, spline counts, joint angles or plunge figures are published by either.
There is no separate differential and no propeller shaft: the Mini keeps front-wheel drive and the differential sits inside the Honda transaxle, exactly as it did inside the A-series gearbox. Final drive and limited-slip availability therefore follow the gearbox code, not the engine code, and the installation manual lists several transmission codes per engine (S1, J1, Y1, A1, YS1 and S4C are named against the B16A alone). One manufacturer supplies equal-length driveshafts specifically to reduce torque steer, which is the practical consequence of a 170 to 200 PS transverse engine in a car of this size. No reachable source gave a final-drive ratio, an LSD recommendation or a torque limit for any of the listed transaxles in this installation.
Status: SUPPORTED · Confidence 66%
One concrete requirement is documented: fit a fuel pump delivering between 32 and 48 PSI, and add a return line on Minis that do not have one (1Q). The second point matters more than it looks, because it is a chassis job rather than an engine job - the injected late Minis and the earlier carburettor cars differ here, and the manual does not say which model years need it. The kit vendor separately lists the fuel system among the modifications that are required but not supplied. Nothing was found on tank, filter, lines, injector sizing or pressure regulation for this installation.
Status: SINGLE_SOURCE · Confidence 48%
Two documented routes, both from the same kit family. The subframe carries two tabs on its front face for mounting a 1992-1998 Honda Civic radiator, which is the parts-bin route; alternatively the vendor sells a radiator kit comprising an aluminium radiator, fan, hoses and a catch can, listed in the complete package under part number MT530600. Either way the radiator moves to the front of the car, which is itself a departure from the Classic Mini, where it sits at the side of the engine. Nothing reachable gave a thermostat specification, fan control strategy, hose routing detail or a reported temperature result, and no build source addressed cooling at all.
Not applicable to this combination: none of the commissioned engine codes is factory forced-induction, and no documented charge piping was found for the baseline conversion.
The exhaust is named as required work and nothing more (1Q). The kit vendor lists it explicitly among the modifications that may be required and are not supplied, alongside fuel and shift linkage; the installation manual, which is otherwise detailed down to which sections of bodywork to cut, contains no exhaust section at all. No reachable source gave a manifold, a downpipe route past the replaced subframe, silencer packaging under a Mini floor, catalyst provision or a lambda sensor position. For a car this small with a transverse DOHC engine and a new subframe under it, that is a substantial gap, and it is one that bears directly on the German approval case.
The decisive constraint is stated in one sentence of the installation manual: only OBD1 computers can be used, because the Mini is a stand-alone system. There is no vehicle bus, no immobiliser handshake and no cluster the Honda ECU can talk to, so the engine management has to run self-contained. The documented route is therefore the Honda engine and ECU harness with a modified OBD1 ECU, sold by the same vendor as a wiring kit with an optional chipped ECU. A documented 1969 Mini takes the other route and runs a Hondata S300 stand-alone instead, which is what an OBD2 donor effectively forces. The manual is candid about the limits of its own support and refers the builder to a Honda tuner for pinouts. No pin plan, no charging or starter integration and no fuse strategy was found in any reachable source.
No reliable combination-specific information found on immobiliser, tachometer, speedometer, coolant gauge or warning lights after the conversion.
Status: OPEN
The suspension is not upgraded but replaced: the subframe comes with its own arms, and the two systems diverge sharply from there. The MTB2 route retains the Mini's swivel hubs and brakes as standard and offers larger front brakes as an option, and its package lists a brake conversion, a big brake kit and coilover shocks as separate part numbers; it also states a hard wheel requirement that is easy to miss - wheels need a 7 mm outboard offset, or spacers, purely to clear the turning radius. The T45 route goes the other way and builds the brakes in, which is why that manufacturer restricts the car to 13 inch wheels and recommends 13x7 with ET+10, and widens the track by three inches per side. A documented 1969 Mini runs coilovers with front AND rear disc conversion. The two wheel-size positions are not a contradiction: one documented B18C1 Mini runs 10 inch wheels, the other system cannot. German inspection guidance is the frame around all of it - where engine output is increased, brakes may have to be strengthened and the suspension adapted.
Status: VERIFIED · Confidence 82%
Six documented problem areas, and the first is the one that decides whether the project is even the right one. First, the extent of the cutting: the manual requires removing the engine, the subframe and everything else in the engine compartment, cutting away both inner fenders, cutting the metal below the stock shock mount, removing metal behind the grille and cutting a marked section of the bulkhead so the alternator pulley clears. This is irreversible bodywork on a monocoque. Second, and directly connected, the kit manufacturer's own disclaimer: 'For off road use only!'. Third, the shift linkage has to be cut apart and rebuilt from pipe by hand until every gear clears the body. Fourth, wheel offset: without a 7 mm outboard offset or spacers the wheels foul at full lock, and one manufacturer's system rules out anything under 13 inch entirely. Fifth, the ECU generation - only OBD1 computers work, which quietly excludes most of the engines actually on the European market unless a stand-alone is fitted. Sixth, the master cylinder: if both master cylinders sit on the left, the brake master cylinder has to be relocated, and the manual recommends a left-hand-drive pedal box for the clearance. On cost, a German forum puts the whole conversion between 3,000 and over 10,000 EUR with a complete B16 build described as achievable under 10,000, and notes that the inspection itself costs real money because road tests are usually required - user statements without a date, treated as such. All prices quoted in this field are as of 31 July 2026.
Status: VERIFIED · Confidence 84%
Two positions exist and they are not reconciled by any source, so both are stated. The manufacturer of the most widely documented conversion kit ends its own installation manual with 'For off road use only!' and a disclaimer of liability - that is the strongest single statement in this dataset and it comes from the party with the most to lose by making it. Against that, a German converter advertises three Honda conversion levels for the Classic Mini including B16 and B18 and states that all its conversions are TUEV-approved. These are not the same object: one is a kit sold worldwide without knowledge of the recipient car, the other is a finished vehicle built and presented by a single German workshop, and a vendor's advertising claim is not an approval document. What no reachable source provides is a report of an actual German inspection of a B-series Mini with the conditions imposed. A German forum indicates the practical shape of it - the inspection costs real money because road tests are usually required.
Status: SUPPORTED · Confidence 58%
Germany, as of July 2026. Starting position: the Classic Mini was built from 1959 to 2000 and had, from the factory, exclusively A-series four-cylinder engines of 848 to 1,275 cc and 25.4 to 57.6 kW; the late series ranges from 41 to 95 PS. A B16 with around 170 PS or a B18 with around 210 PS therefore means at least a doubling, and in many cases a quadrupling, of factory output - in a vehicle whose front subframe including suspension and steering is replaced by a third-party assembly in the process, and whose body is cut open in several places. First, the conversion as such: TUV SUD names engine tuning as a modification requiring inspection and states that the Betriebserlaubnis may lapse in the case of modifications that "may be expected to endanger other road users, change the vehicle category, or worsen emissions or noise behaviour"; a modification report under § 19 StVZO may be required even where an ABE, EC marking or Teilegutachten exists, and with increased engine output "the brakes may have to be uprated and the suspension adapted to the changed performance". Second, individual approval: TUV Rheinland states that without a valid test certificate the modification must be assessed on a case-by-case basis, that such reports may be produced only by officially recognised experts of a technical inspection authority, and that without a positive report no registration takes place. That is the likely route here, because the load-bearing subframe is a third-party part without type approval. Third, the classic-vehicle route, here expressly as a CALCULATION and not as a result: the H-Kennzeichen under § 23 StVZO requires an age of more than 30 years and an overall condition worth preserving, original or faithful to the original, whereby "period repair work or conversions (within ten years of first registration) are acceptable". Production runs to 2000, so all vehicles up to model year 1996 are now more than 30 years old. The ten-year window works out entirely differently depending on vehicle age: for a Mini from 1965 it ends around 1975 and lies far before any B-series engine, while for a Mini from 1990 to 1996 it extends to around 2000 to 2006 and would, by calculation, cover the production periods of the B16A, B16B and the entire B18C range. This calculation follows from the documented figures; it is drawn by no source for this combination, and no source says whether an inspection body would accept an original condition worth preserving when subframe, drivetrain and parts of the body have been replaced. The point remains open. What was expressly not clarified in this run: the emissions classification of a Japanese engine without European type approval in this vehicle, the noise side, and how the replaced subframe is to be substantiated as a load-bearing part.
Status: SUPPORTED · Confidence 66%
All prices as of 31.07.2026. Mini Mania / Mini Tec - Vtec B-Series Engine Conversion Kit MT530000: MTB2 subframe, adjustable upper and lower control arms, two chromoly driveshafts, small parts and instructions; USD 3,502.90; requires a manual gearbox, right-hand drive needs additional work (https://www.minimania.com/part/MT530000/Vtec-B-Series-Engine-Conversion-Kit-For-Mini-Cooper) || Mini Mania / Mini Tec - Ultimate MTB2 Package MTB2-1 with the individual numbers coilover suspension MT511210, radiator MT530600, ECU MT250200, wiring set MT250410, brake conversion MT351100, big brake kit MT310000, driveshafts MTmini-B1, pedal set MT322000, intake hose MTVEN103, RHD steering set MT351200; price not stated (https://www.minimania.com/part/MTB2-1/Ultimate-Mtb-2-Vtec-Conversion-Package) || Potential Motorsport - PMB B-Series Full Kit: T45 tubular subframe, track plus 3 inches per side, billet driveshafts of equal length, billet engine mounts 70A, big brake kit; GBP 7,400.00; 13-inch wheels only, round-nose cars only, without engine, gearbox, wiring and shifter (https://potentialmotorsport.com/shop/conversion-kits/b-series-kit/) || GRacing (Germany) - Honda conversions for the Classic Mini in the B16 (around 170 PS) and B18 (around 210 PS) stages; prices on request only (https://www.gracing.de/mini-tuning/)
https://www.youtube.com/watch?v=_2WEO9uCunY | https://www.youtube.com/watch?v=z0-pFQhCpas | https://www.youtube.com/watch?v=nG1-2DmtDik
No directly openable Instagram finding in this run's own search. One concrete builder name is documented, however: in a reachable article the supercharged B18 Mini is attributed to the Instagram account @vtecturbominiguy. Further search terms for manual follow-up: 'classic mini b18', 'mini vtec swap', 'b16 mini', 'honda swapped mini', '#minivtec'.
https://manualmachine.com/minitec/mtb2kit/1626197-user-manual/ | https://www.minimania.com/part/MT530000/Vtec-B-Series-Engine-Conversion-Kit-For-Mini-Cooper | https://potentialmotorsport.com/shop/conversion-kits/b-series-kit/ | https://hondacodes.wordpress.com/engine-motor-codes/b-series-engine-codes/ | https://www.drivingline.com/articles/not-for-the-faint-of-heart-honda-swapped-mini/ | https://honda-tech.com/articles/b18-swapped-mini-is-retro-vtec-powered-goodness/ | https://mini-forum.de/threads/55452-Kosten-Umbau-auf-Honda-Vtec | https://www.gracing.de/mini-tuning/ | https://de.wikipedia.org/wiki/Mini_(Auto) | https://www.tuvsud.com/de-de/branchen/mobilitaet-und-automotive/tuning-eintragungen-und-aenderungsabnahmen | https://www.tuv.com/germany/de/einzelabnahme.html | https://www.tuv.com/germany/de/kfz-gutachten/oldtimer-h-kennzeichen.html
25 findings | 19 hosts | 19 publisher keys | 19 reachable, 6 unreachable | 15 cited findings across 13 cited publisher keys | 8 German-language findings, 7 reachable | 10 documented searches. Technical-field status count: VERIFIED 5, SUPPORTED 11, SINGLE_SOURCE 4, TRANSFERRED 0, DISPUTED 0, OPEN 3, NOT_APPLICABLE 6. Main-publisher cluster test: no VERIFIED/SUPPORTED field rests only on minimania.com, which supplies three findings. The record is carried by a complete installation guide from the kit manufacturer, plus two structurally entirely different subframe manufacturers (sheet-steel frame versus T45 tubular frame, USD versus GBP), a German turnkey supplier, an engine-code table, three documented vehicles, two German vehicle data sheets, a German cost thread and three German legal sources. Five notes on the counting. FIRST, syndication: the MTB2 installation guide is additionally held twice at pdf4pro.com and once at minimania.com - four locations, ONE document. Under § 2 only the retrievable location is carried, the minimania mirror appears in the list as unreachable so that the mirroring is documented, and the pdf4pro copies were not admitted at all. SECOND, the product mirror: superfastminis.com sells the same MTB2 product as minimania.com and would not have been a second publisher under § 2 - this was recognised BEFORE use, unlike in 014, where the same case only became apparent during evaluation. THIRD, the host trap: hondacodes.wordpress.com normalises to wordpress.com, i.e. it points to the host rather than the operator; harmless, because it is the only wordpress finding, but noted. FOURTH, the genuine multiple entries: minimania.com with three findings (two product pages and the blocked guide mirror), mini-forum.de with two and tuv.com with two - one publisher each; the clustering test came up empty. FIFTH, a delimitation that does not enter the count: stevestonmotorco.com appeared in several search runs as a supposed B-series source, but builds exclusively for the SOHC D series - reachable, but of a foreign engine family under § 4 and therefore cited in no field. Ten findings remain uncited: the six unreachable ones, the three YouTube links (per § 5 not technical evidence) and stevestonmotorco.com for the reason just given. The reason for the gaps can be named. 16vminiclub.com was blocked with HTTP 403 - the same forum that was already blocked for 008 (K20A in the same vehicle), and it runs its own Honda section in which the thread 'B18 or B16' carries this record's core question in its title. allspeedengineering.com would have been the third independent subframe supplier for exactly B16/B18 and could not be retrieved because of an unresolvable robots.txt. The German thread 'Mini mit Honda B18 C06 Motor' at mini-forum.de answered with HTTP 404, although the same publisher was reachable with the cost thread. dutchysmini.com hangs in an https/http redirect loop. This record's three empty fields lie precisely in those four findings: oil pan, immobiliser and instruments, clutch. All prices quoted in this field are as of 31 July 2026.
Type
Power
Torque
ECU