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Morris & Austin Mini Cooper S Mk 1, 2 & 3

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Mini Cooper S

The Cooper S was launched in April 1963 as a higher performance version of the standard Cooper on which it was based. It was, as with the standard Coopers, available in both Austin & Morris versions. In Mk 1 form it first of all used a 1071cc version of the BMC A series engine, which developed a full 15 bhp more than the standard 998cc Cooper. The Cooper S also benefitted from other improvements including larger front disc brakes. In March & June 1964 two new engines were added to the range these being the 1275cc and 970cc respectively. This was to enable the Cooper S take part in the under 1000cc and under 1300cc categories in motor sport, and it was in 1964 that a Cooper S driven by Paddy Hopkirk achieved an outright victory in the Monte Carlo rally.

Hydrolastic suspension was fitted to all Mini's (except estates) from September 1964 including all Cooper models, and other minor detail changes were made at this time such as a combined ignition / starter switch to replace the floor mounted starter button of earlier models. Cooper S models were also fitted with 120 mph and later 130 mph speedometers. After production of just over 4000 cars, the 1071cc model was discontinued in August 1964, with production of the 970cc version being ceased in April 1965 after less than 1000 of them were produced, making this a particularly rare and desirable model today. The remaining 1275cc Cooper S had its formerly optional twin fuel tanks fitted as standard from January 1966.

The Mk II version of the Austin & Morris Mini Cooper was launched in October 1967 and these models featured many cosmetic changes, but most notably a larger rear window and revised rear lights. An all synchromesh gearbox came in 1968. The Mark III Cooper S arrived in March 1970, and was in appearance little different to the standard Mini 1000. The Mk III bodyshells were heavier than those used on the previous models, so performance was a bit down. This coupled with the fact that the Mini Clubman based 1275 GT had been introduced in 1969 - which in effect it was now competing with - meant that sales were slow. The Mk III Cooper was discontinued in June 1971 after just over 1500 were made.


 

Specifications

Model

Mk 1 1071 S

Mk 2 970 S

Mk 1 to 3 1275 S

Years Produced

1963-1964

1964-1965

1964-1971 (see text)

Body Type

2 door saloon, all steel body, mounted on steel front & rear subframes

Length

10ft 0.25in

10ft 0.25in

10ft 0.25in

Width

4ft 7in

4ft 7in

4ft 7in

Weight

1410lb

1410lb

1410lb (1536lb Mk 3)

Engine

4 cyl inline 1071cc

4cyl inline 970cc

4 cyl inline 1275cc

Power

70 bhp @ 6200 rpm

65 bhp @ 6500 rpm

76 bhp @ 5800 rpm

Torque

62lb ft @ 4500 rpm

55 lb ft @ 3500 rpm

79lb ft @ 3000 rpm

Gearbox

4 speed manual

4 speed manual

4 speed manual

Driven Wheels

Front

Front

Front

Brakes

Discs on front and drums on rear. Servo assisted

Front Suspension

Independent by rubber cone until 1964, then Hydrolastic

Rear Suspension

Independent by rubber cone until 1964, then Hydrolastic

 

Performance

Model

Mk 1 1071 S

Mk 2 970 S

Mk 1 & 2 1275 S

Top Speed

92 mph

90 mph

97 mph

0-60 mph

13.5 seconds

13.0 seconds

10.5 seconds

Fuel Consumption

30 mpg

30 mpg

30 mpg

 

Useful Links

UK Classic Parts Ltd

Mini Cooper Register

National Mini Owners Club

Mini Cooper Club

British Mini Club

Mini Cooper S Books at Amazon.co.uk

The Mini Forum

TalkMinis.co.uk

Gallery