Opel Monza

Opel Monza

Introduced in 1978 as a coupe version for the Rekord sedan, the Monza received an important update five years later.

There was a time when Opel tried to compete with BMW and Mercedes-Benz and beat them at their own game. Opel was riding high tides and dared to produce a comfortable, big, fastback such as the Monza. It was a true, daily driver GT vehicle. In 1983 Opel introduced a facelift for the Monza and gave it more power.

The new model featured a new front fascia. Its squared headlights were flush with the grille and the hood. Its clear-lens corner-mounted turn signals replaced the orange ones from the non-facelifted version. The Monza featured a lower apron under the plastic bumper with integrated fog lights depending on the trim level. From its sides, the fastback-shaped vehicle featured a wide side rear window. The liftgate was adorned with a lip spoiler, and the carmaker installed a set of smoked taillights.

Inside, Opel didn’t cut corners and offered an interior fit for a premium GT car. Its Sparco bucket seats with high bolstering offered excellent side support. As an option, the carmaker installed a digital dashboard with an LCD for data such as speed, tachometer, fuel level, and coolant temperature. The BMW 6-Series or the Mercedes-Benz SL didn’t have that option.

Opel improved the engine range offer and installed a 2.5-liter for the base version and a 3.0-liter inline-six for the GSE. The latter was available with either a four-speed automatic or a five-speed manual. It also featured a standard limited-slip differential.

Engine Technical Data


Engine type – Number of cylinders :Inline 6
Engine Code :28H
Fuel type :Petrol
Fuel System :Carburetor Solex 4A1
Engine Alignment :Longitudinal
Engine size – Displacement – Engine capacity :2784 cm3 or 169.9 cu-in
Bore x Stroke :92.0 x 69.8 mm
3.62 x 2.72 inches
Number of valves :12 Valves
Aspiration :N/A
Compression Ratio :9.0
Maximum power – Output – Horsepower :140 PS or 138 bhp or 103 kW @ 5200 rpm
Maximum torque :214 Nm or 157 lb.ft @ 3400 rpm
Drive wheels – Traction – Drivetrain :RWD
Transmission Gearbox – Number of speeds :
Num. of Doors :2  
Wheelbase :268 cm or 105.51 inches  
Length :469 cm or 184.65 inches  
Width :173 cm or 68.11 inches  
Height :138 cm or 54.33 inches  
Aerodynamic drag coefficient – Cx :  
Front Brakes – Disc dimensions :Discs (- mm)  
Rear Brakes – Dics dimensions :Drums (- mm)  
Front Tyres – Rims dimensions :175/- R14  
Rear Tyres – Rims dimensions :175/- R14  
Curb Weight :1375 kg OR 3031 lbs  
Weight-Power Output Ratio :9.8 kg/hp  
Trunk / Boot capacity :350-746 L  
Front Suspension :Independent. McPherson. coil springs. anti-roll bar
Fuel Consumption – Economy – Combined:11.5 L/100km
25 mpg UK / 20 mpg US
Range :608 Km or 378 miles
Fuel Tank Capacity :70 L
15.4 UK gallons
18.5 US gallons
CO2 emissions :275 g/Km (estimate)
Top Speed :195 km/h or 121 Mph
Acceleration 0 to 100 km/h (0 to 62 mph) :10.0 s