The Ascona is one of the most rewarding ways into rear-wheel-drive Opel ownership: straightforward, well supported by the community and genuinely fun to build. But these cars are decades old now, and condition varies wildly. A careful inspection separates a solid project from an expensive lesson.
With a car this age, bodywork is almost always the bigger cost. Engines and gearboxes can be rebuilt or swapped from a deep parts pool; rotten structure is slow, expensive work. Start every inspection with the metal, not the engine.
1. Look hard at the structure.
Inner sills, floors, footwells, suspension mounts and the boot floor are where rust hides. Surface rust is manageable; structural rot is a project of its own. Bring a torch and do not rush.
2. Read the drivetrain.
Cold-start it yourself. Listen for timing chain rattle, watch for smoke, and feel for a gearbox that crunches or jumps out of gear. The CIH engine is tough, but neglect leaves clues.
3. Check the panel gaps and history.
Uneven gaps and fresh underseal can hide past accident repair. Ask for history, and be wary of a car that has obviously been hurried back together.
4. Confirm what is actually there.
Trim, badges and interior parts are increasingly scarce. A complete but tired car is often a better buy than a tidy one missing hard-to-find pieces.
5. Match the car to your plans.
A clean original is worth preserving; a rougher car is a better base for a modified build. Decide which project you want before you fall for the first one you see.

A good Ascona is one of the best-value classics you can build, but the difference between a smart buy and a money pit is almost always in the metal. Inspect slowly, prioritize structure over shine, and buy the most complete car you can afford.
Patience now saves far more later.