Stewart's team-mate, fellow Briton Graham Hill finished a lap down in third position in his BRM P261.

Some had downsized sports car racing engines to suit, but these were heavy and lacked power.

[1] Another new engine based on an American Buick V8 was the Australian Repco V8 in the back of Brabham's new 1966 BT19 chassis.

Meanwhile, Lorenzo Bandini was smashing the lap record before having to ease off to prevent the front brakes wearing out.

Stewart won from Bandini with Graham Hill third and Bob Bondurant fourth the only other car past the line in a race of extreme attrition.