Alfa Romeo 33 Stradale & UCS 2.0L DOHC V8 (1967)
The Alfa Romeo 33 Stradale is a mid-engined sports car built by Italian car manufacturer Alfa Romeo. It is one of the world's first supercars; it was the fastest commercially available car for the standing kilometer when introduced. 18 examples were produced between 1967 and 1969. 'Stradale' (Italian for 'road-going') is a term often used by Italian car manufacturers to indicate a street-legal version of a racing car; indeed the 33 Stradale was derived from the Tipo 33 sports prototype.
The 33 Stradale, first built in 1967, was based on the Autodelta Alfa Romeo Tipo 33 racing car. The car, designed by Franco Scaglione, and built by Carrozzeria Marazzi, made its debut at the Paris Salon de L'Auto 5 October 1967.
The first prototype (chassis no. 10533.01) was built at Autodelta's workshop in Settimo Milanese, side by side with the Tipo 33 'Periscopica' race car in 1967. The body was built by Franco Scaglione and his men, while Autodelta made the technical production. Another magnesium bodied prototype (chassis no. 10533.12) (planned for some street racing) was started by Scaglione. However, this was not finished until 1968 by Marazzi. The two prototypes are the only ones to have dual headlight arrangement. This was redesigned by Scaglione on the following production cars due to regulations on minimum headlight distance from the ground.
Marazzi claims to have built 18 chassis. 5 of them were used for 6 concept cars (one chassis was used twice) by Pininfarina, Bertone and Giugiaro/ItalDesign. Eight are confirmed with Scaglione's beautiful bodies. The rest are experimental or unconfirmed at this point.
The race-bred engine bore no relation to the mass-produced units in Alfa's more mainstream vehicles. The engine is closely related to the V8 of the Alfa Montreal, albeit with smaller capacity and in a much higher state of tune. Both engines were derived from the 33 racers' but differed in many details. Both engines had chain driven camshafts as opposed to the racers' gear driven ones, but the Stradale kept the racing engine's flat plane crankshaft, whereas the Montreal engine had a crossplane crank. Race engineer Carlo Chiti designed an oversquare bore x stroke of 78 mm × 52.2 mm (3.07 in × 2.06 in) dry-sump lubricated all-aluminum 1,995 cc (2.0 L) V8 engine that featured SPICA fuel injection, four ignition coils and twin spark plugs per cylinder. The engine used four chain-driven camshafts to operate the DOHC 2 valves per cylinder valvetrain and had a rev-limit of 10,000 rpm with a compression ratio of 10.5:1, producing 230 PS (227 bhp; 169 kW) at 8,800 rpm and 206 N⋅m (152 lb⋅ft) at 7,000 rpm of torque in road trim and 270 bhp (201 kW) in race trim. Because every Stradale is hand built and unique the power levels can vary by car, used rpms etc., for example the first production Stradale (No. 750.33.101) has a factory datasheet that claims 243 hp (181 kW) at 9,400 rpm with a "street" exhaust and 254 hp (189 kW) with open exhaust.
Alfa Romeo 33 Stradale & UCS 2.0L DOHC V8 (1967)
The Alfa Romeo 33 Stradale is a mid-engined sports car built by Italian car manufacturer Alfa Romeo. It is one of the world's first supercars; it was the fastest commercially available car for the standing kilometer when introduced. 18 examples were produced between 1967 and 1969. 'Stradale' (Italian for 'road-going') is a term often used by Italian car manufacturers to indicate a street-legal version of a racing car; indeed the 33 Stradale was derived from the Tipo 33 sports prototype.
The 33 Stradale, first built in 1967, was based on the Autodelta Alfa Romeo Tipo 33 racing car. The car, designed by Franco Scaglione, and built by Carrozzeria Marazzi, made its debut at the Paris Salon de L'Auto 5 October 1967.
The first prototype (chassis no. 10533.01) was built at Autodelta's workshop in Settimo Milanese, side by side with the Tipo 33 'Periscopica' race car in 1967. The body was built by Franco Scaglione and his men, while Autodelta made the technical production. Another magnesium bodied prototype (chassis no. 10533.12) (planned for some street racing) was started by Scaglione. However, this was not finished until 1968 by Marazzi. The two prototypes are the only ones to have dual headlight arrangement. This was redesigned by Scaglione on the following production cars due to regulations on minimum headlight distance from the ground.
Marazzi claims to have built 18 chassis. 5 of them were used for 6 concept cars (one chassis was used twice) by Pininfarina, Bertone and Giugiaro/ItalDesign. Eight are confirmed with Scaglione's beautiful bodies. The rest are experimental or unconfirmed at this point.
The race-bred engine bore no relation to the mass-produced units in Alfa's more mainstream vehicles. The engine is closely related to the V8 of the Alfa Montreal, albeit with smaller capacity and in a much higher state of tune. Both engines were derived from the 33 racers' but differed in many details. Both engines had chain driven camshafts as opposed to the racers' gear driven ones, but the Stradale kept the racing engine's flat plane crankshaft, whereas the Montreal engine had a crossplane crank. Race engineer Carlo Chiti designed an oversquare bore x stroke of 78 mm × 52.2 mm (3.07 in × 2.06 in) dry-sump lubricated all-aluminum 1,995 cc (2.0 L) V8 engine that featured SPICA fuel injection, four ignition coils and twin spark plugs per cylinder. The engine used four chain-driven camshafts to operate the DOHC 2 valves per cylinder valvetrain and had a rev-limit of 10,000 rpm with a compression ratio of 10.5:1, producing 230 PS (227 bhp; 169 kW) at 8,800 rpm and 206 N⋅m (152 lb⋅ft) at 7,000 rpm of torque in road trim and 270 bhp (201 kW) in race trim. Because every Stradale is hand built and unique the power levels can vary by car, used rpms etc., for example the first production Stradale (No. 750.33.101) has a factory datasheet that claims 243 hp (181 kW) at 9,400 rpm with a "street" exhaust and 254 hp (189 kW) with open exhaust.