Alfa Romeo 155 Crankshaft Replacement Parts

Yes – every Alfa Romeo 155 has a crankshaft, because all variants used a conventional reciprocating internal combustion engine whether petrol or diesel. The crankshaft converts the up-and-down motion of the pistons into rotational power, so it is a fundamental engine component present on every single 155 ever built. What varies is the exact specification of the crankshaft, which depends almost entirely on which engine your car has.

The engine code is the single most important detail – more useful than the year or even the fuel type on its own. You can find the engine code on your V5C or by running a VIN check, and supplying it to the breaker will allow them to match the correct crankshaft immediately. Fuel type (petrol or diesel) and the engine displacement also matter, as a 1.8 Twin Spark crankshaft will not interchange with a 2.0 16v or a 2.5 V6 unit.

The 155 was produced from 1992 to 1998 and received a facelift in 1995, but for crankshaft fitment the critical factor is the engine code, not the model year. Two cars with the same engine code – even one pre-facelift and one post-facelift – will generally use the same crankshaft, whereas two cars from the same year but with different engines will not be interchangeable. Always confirm with the breaker by quoting your registration and engine code, as ancillary or mounting changes within a production run can affect compatibility.

No – although both are petrol Twin Spark engines, the 1.8 and 2.0 variants have different bore and stroke dimensions, so their crankshafts are not interchangeable. The engine code on your V5C will confirm exactly which unit you have, and you should quote that code directly to the breaker when requesting a quote. Never assume a crankshaft will fit based on the Twin Spark badge alone; the displacement difference is fundamental.

No – trim level has no bearing on crankshaft fitment whatsoever. The 155 was offered in variants including base, Super, and the performance-oriented Q4, but the crankshaft is determined entirely by the engine fitted, not by the trim specification. Focus on your engine code, and you can disregard trim differences entirely when sourcing this part.

No – the petrol and diesel engines in the 155 are entirely different units with different crankshafts, and they are not interchangeable under any circumstances. The 155 diesel used a VM-sourced turbodiesel engine, which has its own specific crankshaft dimensions quite different from any of the petrol units. Always match the crankshaft to your exact engine code, and confirm with the breaker against your registration to be certain.