20-valve turbocharged inline engine with connected components
1980 Audi Quattro (Typ 85)
Close-up of a 20-valve turbocharged inline engine with surrounding mechanical and fluid system components, including air intake tubes and fluid reservoirs.
The Car Spy, CC BY 2.0 <https://creativecommons.org/licenses/by/2.0>, via Wikimedia Commons
The Car Spy, CC BY 2.0 <https://creativecommons.org/licenses/by/2.0>, via Wikimedia Commons
Audi