Opel Monza

The Opel Monza was introduced into the UK in October 1978 and was sold in parallel with the Vauxhall Royale Coupe. The only model that was initially available was the 3.0E, Several changes occurred in the range until the 3.0E was replaced by the more sporty GSE which was launched in March 1984. The Monza was discontinued from January 1987 with the impending introduction of the Carlton and Series 3 Senator.

Click on the link to go to specific details on this page
Interior Features Exterior Features
Options Technical Specifications
Fuel Consumption

The following details are for a 1985 Monza GSE.

Interior Features

  • Recaro front seats with adjustable length cushions
  • Cloth trimmed front head restraints
  • Velour cloth door panels
  • Continental-style front floor armrests
  • Leather covered, tiltable four-spoke steering wheel
  • Liquid Crystal Display (LCD) instrumentation
  • Rev. counter, voltmeter, oil pressure gauge
  • Seven function trip computer
  • Digital clock with integral trip computer
  • Headlamps-on warning buzzer
  • Illuminated cigar lighter
  • DC751 stereo radio/stereo cassette player with four speakers
  • Cassette storage facility
  • Illuminated, lockable glovebox
  • Illuminated vanity mirror
  • Integral map-reading lights
  • Four-speed heater fan
  • Rear passenger heating ducts
  • 50/50 split rear seat
  • Hinged and carpeted load compartment cover
  • Carpeted load compartment
  • Courtesy light with delay cut-off
  • Extensive sound insulation
  • Velour carpeting
  • Colour keyed A-pillar mouldings
  • Carpeted front footwell side panels
  • Internal bonnet release
  • Illuminated load area
  • One front and two rear ashtrays
  • Inertia reel front seat belts
  • Front passenger assist handle and two rear assist straps
  • Integrated centre console
  • Side window demist vents
  • Spare wheel cover
  • Roll-over bar

Exterior Features

  • Five speed gearbox
  • Power assisted steering
  • Two-door central locking
  • Alloy road wheels
  • Ultra-low profile radial tyres
  • Sports suspension
  • Limited slip differential
  • Laminated windscreen with graduated tint shadeband
  • Green tinted glass
  • Electrically operated front windows
  • Hinged rear windows
  • Sliding/tiltable steel sunroof with air deflector
  • Halogen headlamps
  • Long range 'pencil beam' driving lights integral with headlamps
  • Integral front halogen fog lamps
  • Reversing lamps
  • Integral twin rear fog lamps
  • Two-speed windscreen wipers with intermittent wipe
  • Intermittent tailgate wash/wipe
  • Electrically operated and heated door windows
  • Heated rear window
  • Rear tailgate spoiler
  • Sill extensions
  • Bodyside protection mouldings
  • Electrically operated aerial
  • Underbonnet lamp
  • Tool kit
  • GSE decals on bonnet, doors and tailgate
  • Two tone horn
  • Acrylic rear panel
  • Locking fuel cap
  • Side repeat indicators


  • Air conditioning
  • 4-speed automatic gearbox (no-cost option)
  • Inertia reel rear seat belts/centre lap belt
  • Two coat metallic paint (no-cost option)
  • Electric operation of sunroof
  • ABS anti-lock braking system
  • Black paint (no-cost option)

Technical Specifications


3.0i cam-in-head, 6-cylinder engine features: Bosch LE-Jetronic fuel injection, deceleration fuel cut-off, idle air control, automatic cold start system, electronic breakerless ignition with electronic ignition timing, hydraulic tappets, viscous drive cooling fan, 12 crankshaft counterbalance weights, thermostatically controlled engine oil cooler.

Hp (DIN) 180.0 @ 5800 rpm.

Torque (Max) 182.9 lb/ft @ 4200 rpm.

Compression ratio: 9.4:1 (4-star fuel)

Maximum speed 133.6mph (manual), 127.4 (automatic)


5-speed all-syncromesh gearbox with centre-console shift. GM automatic transmission, floor mounted T-bar shift lever optional at no extra cost.
Final drive ratios:    3000 (manual), 3.45:1; 3000 (auto),3.45:1


Front: Independent. MacPherson struts with gas pressure damper cartridge, uprated coil springs. Anti-roll bar.
Rear: Independent, semi-trailing arms and progressive miniblock coil springs with gas-pressure telescopic dampers. Anti-roll bar.


Dual circuit, servo-assisted, with 10.7 inch diameter ventilated discs with floating calipers at the front, 11.0 inch diameter solid discs with fixed calipers at the rear. Pressure conscious reducing valve. Handbrake and brake fluid loss warning light.


Re-circulating ball system, power assisted. Energy-absorbing steering column. Turning circle, 32.3ft. 4 turns lock-to-lock.


6Jx15 alloy wheels in anthracite, 205/60 VR 15 ultra-low profile radial tyres.


12 volt negative earth system. 55 Ah battery. 65 amp alternator. Electronic transistorised breakerless ignition with Hall sensor.

Fuel capacities

15.4 gallons (70 litres)

Boot capacity

Total capacity: 26.5 cubic feet
Capacity under parcel shelf: 12.4 cubic feet


Kerb weight: 1370kg (manual), 1415kg (automatic)
Gross vehicle weight: 1935kg

Fuel Consumption

DoT mpg Fuel Consumption Tests measured in MPG (Litres/100km)

  Transmission Simulated Urban Driving Constant Speed Driving
56 mph (90 kph) 75 mph (120 kph)
Monza GSE Coup Manual (5-speed) 19.3(14.6) 38.7(7.3) 30.0(9.4)
Monza GSE Coup Automatic 19.3(14.6) 39.2(7.2) 30.7(9.2)