Was googling some stuff, one link led to another and next thing you know I come across this link
Worth reading the entire link, but this especially under heading BMW BT54
It sounds absolutely incredible, but the world`s most powerful Grand Prix engine was based on a production block! That was taken from the 1969 presented type 2002 and reduced from original cubic capacity of 2.0 litres to the 1.500 ccm the Formula One regulations had allowed for turbocharged engines. To reduce inner tentions within the engine blocks BMW only took those ones that had done more than 100.000 kilometres - " they are like well-hung meat," as engineer Paul Rosche said, who had a very close relationship to Nelson Piquet considering him as a perfect test driver. Later a special treatment had been invented to imitate this high kilometre performance to avoid BMW to run out of old engine blocks. And the 4-cylinder-unit with up to 11.000 revs per minute demanded a verx "heavy" fuel to prevent the engine from blowing up. That synthetic petrol produced out of cole came from a German refinery and its recipe was based on a patent the Nazis once had developed for war purposes.
Also interesting to note that the most powerful engine ever used in F1 circuit was BMW! 5.5 bars (that's 80psi!!!) turbo 4.
...and then this
BMW M turbo engines did not only go to the Brabham Team. Rather, Arrows also used the M power machine from 1984 to 1986, just like ATS in 1983/84 and Ligier in 1987. In 1986 Gerhard Berger won the race in Mexico in a Benetton Formula 1, marking the last triumph of this turbocharged power unit. A year later Road and Track, the US car journal, demonstrated the supreme performance of the Benetton B 186 with Teo Fabi at the wheel: Powered by 900 bhp, Fabi's monoposto accelerated to 100 mph (160 km/h) in exactly 4.8 seconds. And Paul Rosche was confident that this four-cylinder was able to develop a lot more power in practice: "It must have been about 1,400 bhp, but we don't know the exact figure since our engine dynamometer didn't go beyond 1280 bhp."
and this road and track edition from 1986 tested the car
194 mph at 11, 300 rpm
0 - 60 3.0
0 - 100 4.8
0 - 120 5.6
0 - 140 6.8
0 - 160 8.4
0 - 175 10.0
SS 1/4 9.4 at 169 mph
The top timed top speed for the car in 1986 was
218.238 mph at Monza (5.4 bar boost was observed) [/b]