the BTCC was simplified, and just for this year there were two classes:
the biggest Group A class remained with essentially the same drivers as
last year; and a 2-liter class for Group A-like cars, without
evolutions but with the possibility to use a different engine
from the same manufacturer. It would be known as “Class 2” or “Super
Touring” and it would stamp its mark on saloon racing for the next
decade. BMW destroked its M3 engine to 2-liter and put it in the well
known M3; Prodrive and to a lesser extent Pyramid were the main
contenders, with two noticeable exceptions. The private M3 of Nettan
Lindgren scored a popular win at Thruxton, while the Vic Lee entered M3
of Jeff Allam was the first attempt of a successful though
Robb Gravett deservedly won the title with his under financed Trakstar outfit, but his Yokohama tires probably made up for that. Nine wins from 13 races against Harvey, Rouse and all the other Sierra runners was a fine achievement. In class B, the fight was between Cleland in the new Cavalier and Sytner in the Prodrive M3; the latter came out on top, second overall in the championship.
The fields were a bit thin compared with earlier years, but surely the single-class 1991 championship would see more entrants.