This is a list of final drive ratios which were available in various cars that will fit in the MGA (and early MGB) banjo type rear axle.

Model	Engine	Rear Axle Ratio	Teeth R/P	Max. Brake HP	Kerb Weight lbs.	Wt/HP Ratio
Austin A55 van, Morris JU and J2 vans	----	5.125	41/8	--	----	-----
Austin A10cwt & A15cwt vans, early Sherpa Van	----	x.xxx	xx/x	--	----	-----
Morris Cowley 1200	BP12M	5.125	41.8	42	2464	58.67
MG ZA Magnette	BP15GA	4.875	39/8	60	2464	41.07
Austin A50 & A55 & Wolseley 15/50	----	4.875	39/8	50/55	----	-----
Morris Oxford series II	BP15M	4.875	39/8	50	2464	49.28
Morris Oxford series III low compression	BP15ML	4.875	39/8	50	2464	49.28
Morris Oxford series III high compression Morris Oxford series IV	BP15MH	4.875	39/8	55	2464	53.11
MG ZB & ZBV Magnette	BP15GC	4.556	41/9	68	2464	36.23
Austin A60 pickup (and van)	16AC-16AD	4.556	41/9	61	2200	36.07
Austin A55 mk2, A60 Countryman, Morris Oxford series 5, Morris Oxford Traveller Series 6, Wolseley 15/60	----	4.556	41/9	--	----	-----
MG Magnette mk3 & mk4, Austin A60, Morris Oxford series 6, Riley 4/68 & 4/72, Wolseley 16/60	----	4.3	43/10	--	----	-----
MGA 1500 Tourer, early	BP15GB	4.3 *1	43/10	68	1988	29.23
MGA 1500 Coupé, early	BP15GB	4.3 *1	43/10	68	2015	29.63
MGA 1500 Tourer	15GB-15GD	4.3 *1	43/10	72	1988	27.61
MGA 1500 Coupé	15GB-15GD	4.3 *1	43/10	72	2015	27.99
MGA Twin Cam Tourer	16G-16GB	4.3 *2	43/10	108	2185	20.23
MGA Twin Cam Coupé	16G-16GB	4.3 *2	43/10	108	2245	20.79
MGA Twin Cam Tourer, late	16GB	4.3 *2	43/10	100	2185	21.85
MGA Twin Cam Coupé, late	16GB	4.3 *2	43/10	100	2245	22.45
MGA 1600 Tourer	16GA	4.3 *1	43/10	79.5	2016	25.36
MGA 1600 Coupé	16GA	4.3 *1	43/10	79.5	2075	26.10
Lotus Elite	(C-C)	4.222 *6	38/9	83	1455	17.53
MGA 1600 Mk.II Tourer, High Compression	16GC	4.1	41/10	90	2016	22.40
MGA 1600 Mk.II Coupé, High Compression	16GC	4.1	41/10	90	2075	23.05
MGA 1600 Mk.II Tourer, Low Compression	16GC	4.1	41/10	85	2016	23.72
MGA 1600 Mk.II Coupé, Low Compression	16GC	4.1	41/10	85	2075	24.41
MGB Tourer 1962-1967	18G-18GB	3.909 *3	43/11	95	2030	21.37
Wolseley 6/80 - 1948-1954	22?	3.909 *5	43/11	72	25cwt	-----
Wolseley 24/80 - 1962-1967	24?	3.909	43/11	80	25cwt	-----
New manufacture special www.autogear.co.uk part no. CWP033 (Courtesy of the Wayback Machine) New web site: www.autogear.uk.com Available from Basil Adams in CA, USA	----	3.7	37/10	--	----	-----
MGA at Le Mans in 1955	1500	3.308 *4	43/13	--	----	-----
‘B’-Series engines and banjo-style rear axles were used for all MG ZA, ZB, MGA, and early MGB *1 Optional gear set: 4.556 *2 Optional gear set: 4.875 *3 Optional overdrive on later models, final drive including OD = 3.14 *4 Limited production 43/13 gearing from 1955, very rare. See next page *5 The Wolseley 6/80, came 5 years before the ZA Magnette, and 7 years before the MGA. Casting number on the dfferential is ATB7009 (others listed here are ATB7182). It should be noted that the earlier assembly has a seal on the input shaft with smaller OD, which might imply smaller bearings on the input shaft. This differential does however bolt into the MGA rear axle. You may expect to find an outline of Australia circling the MOWOG on the casting, indicating that this was made in Australia. Peter Baldry from the MGCC Sydney relates that this differeitial is from the 24/80 Wolseley, that the only mod needed is to change the sun gears to take the half shafts, and the pinion seal size is 2.385" OD. *6 The UK MG owners club can supply them, but of unknown quality. Also Heathrow Transmisions, who get theirs from Italy, so they might be OK.

Addendum April 2011:
Newly-manufactured crownwheel and pinion gearsets for the Hardy-Spicer banjo-type rear axle (Austin B-series axle) of the MGA and early MGB Roadster are currently available in:
    3.700:1 - available from Autogear, Part # CWP033
    3.909:1 - available from Moss Motors, Part # 267-165. and Autogear, Part # CWP034
    4.100:1 - available from SC Parts Group and Cambridge Motor Sports
    4.222:1 - available from the UK MG owners club (may be questionable quality)
    4.222:1 - available from Heathrow Transmisions (who get theirs from Italy)
    4.300:1 - available from SC Parts Group and Cambridge Motor Sports
    4.556:1 - available from Moss Motors, Part #267-185, and Cambridge Motor Sports
    4.875:1 - available from Victoria British, Part # 5-1049