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Opel Monza: A1 and A2 generations, six-cylinder engines and what to check
The Opel Monza is a flagship sports coupe produced from 1978 to 1986, built on the Senator platform. We're looking at the A1 and A2 series, six-cylinder engines, the GSE version, and what to check when buying this classic car.
Monza in brief
The Monza is the coupe version of the Opel Senator: long, low, with three doors and rear-wheel drive. It debuted in 1978 and was Opel's flagship for a sportier audience, offering a comfortable interior and good equipment.
Today, the Monza is valued as a rare classic Opel. Few examples remain, and supply in Lithuania is limited, so the price is often determined by condition and history.
What's the difference between A1 and A2?
The A1 series (1978–1982) was the first Monza shape, while the A2 (from 1982) received a refreshed front end, revised interior trim, and slightly improved engines and equipment.
The sportier A2 version is called the GSE: it stands out with additional aerodynamic elements, sport seats, and a more powerful engine. Due to these details, it's the most sought-after among collectors.
Engines and transmissions
The Monza came with six-cylinder inline petrol engines — mostly 2.5 and 3.0 litres. Power ranges from around 140 to 180 hp depending on the version and year. Check specific details in the car's documents.
The transmission is a 5-speed manual or automatic. The car has rear-wheel drive.
What to check when buying a used Monza
First off — body corrosion: rust spots, floors, arches, door sills, and the rear boot. The more affected the body, the pricier the restoration, and some body parts can be a nightmare to find.
Check the engine: oil leaks, the distributor, the fuel system, and electrical components. Inspect the interior: plastics, seats, and trim will show their age. Before buying, consult with a seasoned Opel mechanic.
Trim levels
Names and equipment vary by market and year; we list the most commonly found trims in Europe.
Monza A1
1978–1982First-series coupe with a six-cylinder engine.
- Six-cylinder inline engine
- Rear-wheel drive
- Often — a five-speed manual gearbox
Monza A2
1982–1986Refreshed series with an improved front end and interior.
- Improved front end and interior
- Six-cylinder inline engine
- Rear-wheel drive
Monza GSE
A2 eraSportier A2 version with a more powerful engine.
- More powerful six-cylinder engine
- Often — sporty seats
- Additional aerodynamic elements
Comparing Monza versions
| A1 | A2 | GSE | |
|---|---|---|---|
| Who it's for | For classic and original design enthusiasts | For most buyers | For collectors |
| Engine | Six-cylinder, around 140–180 hp | Six-cylinder, around 140–180 hp | Six-cylinder, more powerful |
| Gearbox | Manual or automatic | Manual or automatic | Often manual |
| Price in the used market (relatively) | €€ | €€ | €€€ |
Many buyers will be happy with a well-preserved A2. The GSE is for collectors and those who prioritise a sporty look.
Pros
- A long, elegant sports coupe design
- The sound and character of a six-cylinder engine
- A comfortable, spacious interior
- A rare classic Opel
Cons
- Body rust and hard-to-find parts
- High fuel consumption
- Limited availability in Lithuania
Frequently asked questions
Is the Monza a Senator coupe?
Yes, the Monza was built on the same platform as the Opel Senator and is its coupe version.
What is the Monza GSE?
It's a sportier A2 series version with a more powerful engine and additional exterior and interior elements.
Does the Monza have rear-wheel drive?
Yes, all Monzas have rear-wheel drive.
Updated 2026-10-19 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
