[RWebb]

Lotus Elan weighs 1,500 lbs. (!)
began with 105 hp out of a 1558 cc Lotus twin-cam engine, by 1967 it had 115 hp, in 1971 up to 126 hp

1967 figures would give it an oompah ratio of 13 to 1; 12:1 for the 1971 Sprint (assuming it didn't pork out by then)

what were the torque figures and what rpm did you have to spin that little sucka at to get the hp?

1,500 is a key number for me...