What was the power output for a police cooper s I know the " ordinary " s is 78bhp but given the they had to achieve 100mph and they had a better cam , carbys etc etc ......

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That's why it's good to be.............ME

Good question. Never seen it quoted anywhere.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

I would expect it was 78bhp. But a guaranteed 78bhp and not a sales brochure 78bhp.

most "S"`s were lucky to have 70hp at the engine
Police spec would be slightly more but every engine was different to a slight degree
Back in the day-->sometimes an "S" would come in here for service (not long after being sold brand new) & was way quicker than the average

people used to call them "Freak engines" but in my opinion those very few were probably
more close-to the way they were "Meant" to be,,, closer to the "Blue-print" than the average one

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

They did 106mph downhill, the nice policeman told me when I stopped for him after a long pursuit.
That was in 1969, probably before they got the twin HS4s.

(Edit) I've been good ever since.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Weren't standard 1275 (Ss) quoted at 75hp???

Back in the 40/50s Rolls Royce hot tested every engine (on coal gas). Sub specification engines were sent back to assembly, disassembled and parts put back into the assembly line. Mildy optimal engines were sent to Bentley. The few super-optimal examples that turned up were disassembled and parts put back into the assembly line.

I doubt BMC were so anal....

Cheers, Ian

75HP, 78HP, depends what book you read. GR told me he has never seen 75 from a bog stock S on his engine dyno.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Guesstimate?

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That's why it's good to be.............ME

depends on what kind of police car you're talking about? Police cars came in many different spec.

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

Two specifications actually for NSW Police. All Mark 1 Cooper S's and all MK II Cooper S's up to car #2371 were stock standard showroom models from a performance viewpoint. The first car with performance improvements (SPO41 - Police Specification) was car #2372.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

The carbs alone are a big release of potential. I love my stock spec engines, but a police spec with the slight mods really add some bite to the Cooper S bark.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

Sorry I didn't know he was after NSW police specs.

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

Ah, OK, I assumed he was. All good, no need for an apology.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

The CAMS (FIA) Production Certificate (homologation form) for the Mini Clubman GT lists the following information:

Max. engine output 78 DIN HP at 5,800 rpm. Max torque 80 lb/ft at 3,000 rpm. Max speed of car 156 kmh (97 mph).

The subsequent Production Certificate for the SPO28 Clubman GT (police specification) is one page. It only shows variations to the original specification and nothing in the Performance section, unfortunately.

Greg Coates has a race SPO41 MK II S. He may have some comparative performance data versus a standard power plant.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Sorry no data to prove. To make matters worse Hp figures are irrelevant. Quoting a Hp figure will only be relevant to that particular dyno, throw it on another dyno and it will invariably read something different. Of interest though, when I spoke to John Cotter (BMC works dept) he claimed all the works built production cars produced between 91 and 93 Hp on their engine dyno and did state that a standard one produced around 75. He was pretty adamant about the figures. Doesn't help with your query but does show you can get more from less with a bit of fettling.

I previously owned a Tamarisk Green SPO41 that was in concourse original condition. Comparing to my father's 2 owner Mk2 S, the SPO41 was definitely more lively on the road, so whatever the Hp gain from the SPO41 was, it was definitely noticeable.

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car