Alfa Romeo 33 modello TT 12 was born in 1973 designed by Carlo Chiti, after the previous experiences of the Alfa Romeo 33/2 Daytona and Alfa Romeo 33/3 Le Mans models.The abbreviation TT means "Tubular Chassis". Only 6 cars were produced.

Features

• motor position: central/rear longitudinal
• engine weight: 180 kg 396.8 lbs
• 12 opposed cylinders (180°)
• 48 DOHC valves
• 2995 cc 182.8 cu in
• 500 hp 373 kW 
• 11.500 rpm
• compression 12.0:1
• power to weight 0.75 bhp/kg
• 5 gears + RM
• 330 kmh 205.05 mph
• Chassis: AR 11512-008
• 77 mm (3 in) cylinder diameter
• Cylinder stroke 53.6 mm (2.1 in)
• Lucas Fuel Injection
• rear clutch
• 2 double overhead camshafts
• tubular frame 
• dry twin ventilated disc brakes, rear integrated
• hydraulic control
• lubrication: dry sump
• Front suspension: anti-roll bar, coil springs on telescopic shock absorbers, double wishbone
• Rear suspension: anti-roll bar, coil springs on telescopic shock absorbers, single upper arms, double lower arms
• Fiberglass bodywork
• Wheelbase: 2340 mm
• length: 3800 mm (149.6 in)
• Width: 2050 mm (80.7 in)
• Height: 960 mm (37.8 in)
• weight 960 kg (1,477 lbs)

Wins

1974  Monza  1000 km (Merzario-Andretti)

1975  Dijon 800 km , Monza  1000 km, Nurburgring (Merzario-Laffite), 

                Spa 1000 km, Zeltweg 1000 km, Watkins Glen 6 hour (Pescarolo-Bell), 

                Pergusa (Merzario-Mass)

                Targa Florio (Merzario-Vaccarella)

Drivers

•  Mario Andretti
•  Arturo Merzario 
• Derek Bell
• Nino Vaccarella
• Jochen Mass
• Jacky Ickx
• Jacques Laffite
• Henri Pescarolo

In 1976 the activity of the 33 TT 12 is closed and Alfa Romeo presents the new model Alfa Romeo 33 SC 12