LouG
Well-Known Member
- Joined
- Mar 11, 2025
- Threads
- 33
- Messages
- 2,590
- Reaction score
- 3,007
- Location
- New Zealand
- Vehicle(s)
- 2025 Mustang GT
A given amount of horse power requires an appropriate amount air and fuel. My 300hp turbo four got down to 16 litres per 100kms with enthusiastic driving, only a little different to the Mustang in similar conditions. Cruising at legal speeds is another matter though, much better than the FordTurbos rarely give the fuel economy gains that EPA testing suggests. An extreme example is that I tell people I bought my e90 M3 after it won a Top Gear fuel economy challenge against a Prius (I love watching greenies' heads explode) . Amazing how non-economical a small engine run near maximum is compared to a V8 that is barely past idle.
M3 followed a Prius as fast as it could navigate the track and the M3 did really end up with better fuel economy...turbos in EPA test are not pushed as hard as turbos in the real world, so fuel economy really drops off in real use.
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