Any idea what motor was in that? Early S42?
Doubtful.
This was a car run by two small independent teams (I believe its the same car - different seasons/teams). So I doubt it was running anything exotic. Likely just a race prepped M42 street motor. The 2 liter Super Touring formula was introduced in 1990 and became the only BTCC class in 1991.
Every other BMW Super Touring BTCC team during this period was running a 2.0 liter S14 engine. These smaller displacement S14s also powered the 92-94 E36 318i bodied BTCC cars. When the S14 homogulation eligibility ran out in 1995 BMW introduced the S42 motor to replace it (and changed the model designation to 320i?). Some BMW teams ran the S42 in 1994 for development, but it didn't become a customer option until 95-96.
I wonder where this car is now.