1071
The 1071 cc version was another one-off, this time for the Mini Cooper S. It used a new 70.6 mm bore size and the 68.26 mm stroke from the 848. It was only produced in 1963 and 1964.
Applications:
· 1963–1964 Austin/Morris Mini Cooper S, 70 hp (52 kW) at 6000 rpm and 62 ft·lbf (84 Nm) at 4500 rpm
970
The Mini Cooper S next moved on to a 970 cc version. It had the same 70.6 mm bore as the 1071 cc Cooper S but used a shorter 61.91 mm stroke. It was produced from 1964 through 1967.
Applications:
· 1964–1967 Austin/Morris Mini Cooper S, 65 hp (48 kW) at 6500 rpm and 55 ft·lbf (75 Nm) at 3500 rpm
1275
The largest A-Series engine displaced 1.3 L (1275 cc). It used the 70.6 mm bore from the Mini Cooper S versions but the 81.28 mm stroke from the plain Mini Cooper. It was produced from 1964 through 1980 when it was replaced by an [[#1275 A+|A+ version]].
Applications:
· 1964–1971 Austin/Morris Mini Cooper S, 76 hp (57 kW) at 5800 rpm and 79 ft·lbf (107 Nm) at 3000 rpm
· 1966–1970 Austin-Healey Sprite MkIV, 65 hp (48 kW) at 6000 rpm and 72 ft·lbf (98 Nm) at 3000 rpm
· 1966–1974 MG Midget MkIII, 65 hp (48 kW) at 6000 rpm and 72 ft·lbf (98 Nm) at 3000 rpm
· 1967–1968 MG 1300/Wolseley 1300, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3000 rpm
· 1967–1968 Riley Kestrel 1300, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3000 rpm
· 1967–1968 Vanden Plas Princess 1300, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3000 rpm
· 1967–1973 Morris 1300, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3000 rpm
· 1967–1974 Austin 1300, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3000 rpm
· 1967 MG 1275/Riley 1275, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3500 rpm
· 1967 Wolseley 1275, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3500 rpm
· 1967 Vanden Plas Princess 1275, 58 hp (43 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 3500 rpm
· 1968–1969 Riley Kestrel 1300/Riley 1300, 70 hp (52 kW) at 6000 rpm and 77 ft·lbf (104 Nm) at 3000 rpm
· 1968–1971 Austin America (automatic), 60 hp (45 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 2500 rpm
· 1968–1973 Wolseley 1300 (manual), 65 hp (48 kW) at 5750 rpm and 71 ft·lbf (96 Nm) at 3000 rpm
· 1968–1973 MG 1300 MkII, 70 hp (52 kW) at 6000 rpm and 77 ft·lbf (104 Nm) at 3000 rpm
· 1968–1974 Vanden Plas Princess 1300 (manual), 65 hp (48 kW) at 5750 rpm and 71 ft·lbf (96 Nm) at 3000 rpm
· 1968 MG 1300/Riley Kestrel 1300, 65 hp (48 kW) at 5750 rpm and 71 ft·lbf (96 Nm) at 3000 rpm
· 1969–1971 Morris 1300GT, 70 hp (52 kW) at 6000 rpm and 74 ft·lbf (100 Nm) at 3250 rpm
· 1969–1974 Mini 1275GT, 59 hp (44 kW) at 5300 rpm and 65 ft·lbf (88 Nm) at 2550 rpm
· 1969–1974 Austin 1300GT, 70 hp (52 kW) at 6000 rpm and 74 ft·lbf (100 Nm) at 3250 rpm
· 1971–1980 Morris Marina, 60 hp (45 kW) at 5250 rpm and 69 ft·lbf (94 Nm) at 2500 rpm
· 1971 Austin Sprite, 65 hp (48 kW) at 6000 rpm and 72 ft·lbf (98 Nm) at 3000 rpm
· 1973–1980 Austin Allegro, 59 hp (44 kW) at 5300 rpm and 69 ft·lbf (94 Nm) at 3000 rpm
· 1974–1980 Mini 1275GT, 54 hp (40 kW) at 5300 rpm and 65 ft·lbf (88 Nm) at 2550 rpm
A-Plus versions
British Leyland was keen to update the old A-Series design in the 1970s. However, attempts at replacement, including an aborted early-70s K-Series and an OHC version of the A-Series, ended in failure. The little A-Series just worked too well. So the "A-Plus" was born. By tweaking the engine, BL engineers were able to extract more power without affecting torque. Some engine components were also replaced with more-reliable designs.
998 Plus
The A-Plus version of the 998 cc motor was produced from 1980 through 1992.
Applications:
· 1980–1982 Mini 1000/City/HL, 39 hp (29 kW) at 4750 rpm and 52 ft·lbf (71 Nm) at 2000 rpm
· 1980–1982 Austin Allegro, 44 hp (33 kW) at 5250 rpm and 52 ft·lbf (71 Nm) at 3000 rpm
· 1980–1990 Austin Metro, 41 hp (31 kW) at 5400 rpm and 51 ft·lbf (69 Nm) at 2700 rpm
· 1982–1988 Mini HLE/City E/Mayfair, 40 hp (30 kW) at 5000 rpm and 50 ft·lbf (68 Nm) at 2500 rpm
· 1988–1992 Mini City/Mayfair, 42 hp (31 kW) at 5250 rpm and 58 ft·lbf (79 Nm) at 2600 rpm
1275 Plus
The big 1.3 L (1275 cc) engine was also given the "A-Plus" treatment. This lasted from 1980 through 2000, making it the last of the A-Series line.
Applications:
· 1980–1982 Austin Allegro, 62 hp (46 kW) at 5600 rpm and 72 ft·lbf (98 Nm) at 3200 rpm
· 1980–1984 Morris Ital, 61 hp (46 kW) at 5300 rpm and 69 ft·lbf (94 Nm) at 2950 rpm
· 1980–1990 Austin Metro, 63 hp (47 kW) at 5650 rpm and 72 ft·lbf (98 Nm) at 3100 rpm
· 1982–1989 MG Metro, 72 hp (54 kW) at 6000 rpm and 73 ft·lbf (99 Nm) at 4000 rpm
· 1983–1985 Austin Maestro HLE, 64 hp (48 kW) at 5500 rpm and 73 ft·lbf (99 Nm) at 3500 rpm
· 1983–1993 Austin Maestro, 68 hp (51 kW) at 5800 rpm and 75 ft·lbf (102 Nm) at 3500 rpm
· 1984–1989 Austin Montego, 68 hp (51 kW) at 5600 rpm and 75 ft·lbf (102 Nm) at 3500 rpm
· 1989–1990 MG Metro GTa, 73 hp (54 kW) at 6000 rpm and 73 ft·lbf (99 Nm) at 4000 rpm
· 1990–1991 Mini Cooper, 61 hp (46 kW) at 5550 rpm and 61 ft·lbf (83 Nm) at 3000 rpm
· 1990–1991 Mini Cooper S, 78 hp (58 kW) at 6000 rpm and 78 ft·lbf (106 Nm) at 3250 rpm
· 1991–1996 Mini Cooper 1.3i/Cabriolet, 63 hp (47 kW) at 5700 rpm and 70 ft·lbf (95 Nm) at 3900 rpm
· 1991–2000 Mini Cooper S 1.3i, 77 hp (57 kW) at 5800 rpm and 80 ft·lbf (108 Nm) at 3000 rpm
· 1992–2000 Mini Sprite/Mayfair, 50 hp (37 kW) at 5000 rpm and 66 ft·lbf (89 Nm) at 2600 rpm
1275 Turbo
The 1.3 L (1275 cc) engine was turbocharged, producing the highest-output A-Series variant at 96 hp (72 kW) in the 1989 Mini ERA Turbo. Turbo versions lasted from 1983 through 1990.
Applications:
· 1983–1989 MG Metro Turbo, 93 hp (69 kW) at 6130 rpm and 85 ft·lbf (115 Nm) at 2650 rpm
· 1989–1990 Mini ERA Turbo, 96 hp (72 kW) at 6130 rpm
1275 TPi
A special "twin-port injection" version of the 1.3 L (1275 cc) engine was developed by Rover engineer, Mike Theaker. It was the last A-Series variant, produced from 1997 through 2000.
Applications
· 1997–2000 Mini Cooper 1.3i (TPi), 63 hp (47 kW) at 5500 rpm and 70 ft·lbf (95 Nm) at 3000 rpm
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