The S42 engine was a 2.0L touring car engine with a 86.5mm bore and around a 85mm stroke, which shared the same block as the street going M42. Unlike the common M42, the S42 had a more sophisticated engine management system, and had individual throttle bodies. The S42 unfortunately did not share the same valvetrain as the M42, and is a solid lifter valvetrain (possibily from the S50Euro) fully capable of over 9000rpm, but was limited to a 8500rpm redline, as dictated by touring car rules. It was mounted upright in the bay, not slanted, and ran on a full dry sump oiling system. The pistons had a static compression ratio of around 12:1, and running on pump gas, the S42 made around 280hp (and up to around 310hp later in it's life).
Har fått med meg nå at dette ikke er en m42 motor, men om man leser om S42 på nett så er det samme blokk, med andre stempler ,kammer og veiv +litt annet
Det jeg skal frem til er at det er mye potensiale i en m42 motor som m50 s50 og andre motorer.
Er ikke bare 6èr motorene som er noe å bygge på det finnes gode 4 syl fra bmw og