The Alfa Romeo 155 Q4 was the road car that joined Alfa’s new front-drive 155 saloon to the turbocharged, four-wheel-drive hardware of the Lancia Delta Integrale family. It appeared in 1992, the year Alfa began using Q4 consistently for its all-wheel-drive road models.
A new kind of Alfa saloon
The 155 replaced the rear-drive 75 and used the Fiat Group Tipo platform. Most versions were front-wheel drive, but the Q4 installed a longitudinally complex turbocharged four-cylinder and permanent four-wheel-drive system. It gave the new saloon a genuine technical flagship.
Integrale connection
The 2.0-litre 16-valve turbo engine and four-wheel-drive concept were closely related to the Lancia Delta Integrale’s. That does not make the 155 Q4 a rebodied Delta: wheelbase, body, tuning and purpose differed. But the shared engineering explains both its performance and its specialist maintenance needs.
Road car versus touring car
The 155 became one of the defining touring cars of the 1990s. Alfa Romeo’s official Q4 history notes that competition cars based on the 155 Q4 won the 1992 Italian Superturismo title and the 1993 DTM. Those racers were not standard Q4 road cars, but the production model provided a powerful technical and marketing starting point.
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Wide-body evolution
Later 155s adopted a wider track and visibly flared front wings. Buyers and restorers need to distinguish genuine Q4 specification from ordinary 155s modified with bodywork or badges. Build date, chassis details and original mechanical configuration matter.
Why it is rare
The Q4 was expensive, complex and produced in much smaller numbers than mainstream 155s. It was not officially common in Britain, so surviving UK cars may have varied import histories. Correct drivetrain, cooling and electronic work requires specialist knowledge.
Why the 155 Q4 matters
It captures Alfa Romeo at a transition point: Fiat Group platform sharing, Lancia-derived turbo technology, a new Q4 identity and a motorsport programme that rebuilt the 155’s reputation. It is one of the most technically interesting road-going Alfas of the decade.
Frequently asked questions
What engine does the Alfa 155 Q4 use?
A 2.0-litre 16-valve turbocharged four-cylinder closely related to the Lancia Delta Integrale engine.
Is the 155 Q4 four-wheel drive?
Yes. Q4 denoted Alfa Romeo’s all-wheel-drive versions from 1992 onward.
Is it a rebodied Delta Integrale?
No. It shares important engine and driveline concepts, but the 155 has its own platform dimensions, body, tuning and saloon role.
Did the road car win the DTM?
No. Highly specialised racing cars based on the 155 Q4 won major titles; they were not standard road cars.
Why is the 155 Q4 scarce?
It was a costly, complex flagship sold in limited numbers compared with ordinary 155 versions.
Research sources
- Alfa Romeo: history of Q4 all-wheel drive
- Alfa Romeo official centenary history
- Wikimedia Commons records linked beneath each image.
Continue the Alfa Romeo story
Browse the Rare & Performance Alfa Romeo hub for more model histories, engineering stories and connected guides.
