The 1962 Abarth 850 could crank out 52 bhp (at 6000 rpm), 55 bhp (at 6200 rpm) or 57 bhp (at 6500 rpm). These little sedans racked up victories right and left, helping Abarth win the Manufacturer's Championship 7 years running, from 1962 to 1967, and the European 'Challenge' touring 850 Class in '65, '66 and '67. When the 55 bhp version won the tough Nurburgring race in 1963, the cars with the motor henceforth wore that German track's name on their trunk lids. The later 57 bhp version first wore the nickname SS, then took on the word 'Corsa' (Italian for race) and competed in Touring's Group 2 and Group 5. The last two 850TC/Corsas had compression ratios of 12.5:1 and generated 78 bhp at 8000 rpm with the single Solex carburetor, or a whopping 93 bhp at 8000 rpm with two Weber 40 DCOE 2s. Those Group 5 Corsa cars reached top speeds of 190 k/h (118 mph) and wiped out most of the competition.

source: http://www.conceptcarz.com/vehicle/z11099/Abarth-850-TC.aspx