The Ferrari 275 is a series of front-engined V12-powered grand touring automobiles with two-seater coupé and spider bodies produced by Ferrari between 1964 and 1968. The first 275 series cars were powered by a 3.3 L (3286 cc) overhead camshaft Colombo 60° V12 engine producing . An updated 275 GTB/4 was introduced in 1966, with a revised four overhead camshaft engine producing . The 275 series were the first road-going Ferraris equipped with a transaxle and independent rear suspension. Pininfarina designed the 275 coupé and spider bodies, while Scaglietti designed the 275 GTS/4 NART Spyder, of which only 10 were made. Motor Trend Classic named the 275 GTB coupé/GTS spider as number three in their list of the ten "Greatest Ferraris of all time", and the 275 GTB/4 was named number seven on Sports Car International's 2004 list of Top Sports Cars of the 1960s. In a September 1967 road test, Road & Track described the NART Spyder as "the most satisfying sports car in the world." Two-cam models All 275 coupé and spider models build from 1964 until the 275 GTB/4's introduction in 1966 were equipped with an overhead cam 3.3 litre V-12 engine (one camshaft for each cylinder bank). These early models are often called "two-cam" cars to distinguish them from later 275 models. 275 GTB The 275 GTB was a two-seat grand touring coupé produced between 1964 and 1966. The name of this model was derived from the engine's per-cylinder displacement of 275 cc and the Italian designation Gran Turismo Berlinetta. The 275 GTB used a double overhead cam 3.3 litre Colombo-designed 60º V-12 engine designated Tipo 213. This engine was the final development of the Colombo V12, with a stroke of 58.8 mm and a bore of 77 mm. The internal parts of the engine were derived from those used in other Ferrari models including the 250 GTE 2+2, 250 Lusso and 250 GTO. Three twin-choke Weber 40 DCZ 6 or 40 DFI 1 carburetors were equipped as standard. Power was claimed to be at 7600 rpm, but provided closer to 240- in actual use. A factory option of six twin-choke Weber 40 DCN carburetors was also available, which Ferrari claimed provided at 7500 rpm although the actual increase in power over the three-Weber setup was likely only 20-25 hp. The rear wheels were driven by a 5-speed manual transaxle with Porsche-style syncromesh and a limited-slip