The 2017 Mercedes-Benz C63 AMG Coupe is the likely challenger to the M4 crown, and we've actually preferred it in earlier iterations over the BMW.
The 2017 Audi S5 will be a limited production run ahead of a completely new S5 due next year for 2018.
The Cadillac ATS-V Coupe feels just as insane as the M4 at some points, but its manual transmission can let it down.
Porsche's 718 twins are more natural competitors against the two-door M4 (rather than the four-door M3), particularly in "S" guise.
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|2017 BMW 4-SeriesBrowse Used Listings||2017 Mercedes-Benz C ClassBrowse Used Listings||2017 Porsche 718Browse Used Listings|
|17 MPG City / 34 MPG Hwy||17 MPG City / 34 MPG Hwy||20 MPG City / 28 MPG Hwy|
|Intercooled Turbo Premium Unleaded I-4||Intercooled Turbo Premium Unleaded I-4||Intercooled Turbo Premium Unleaded H-4|
|Compact Cars||Compact Cars||Two-Seaters|
|430i Gran Coupe SULEV||C 300 Sedan with Sport Pkg||Coupe|
|Rear Wheel Drive||Rear Wheel Drive||Rear Wheel Drive|
|Automatic w/OD||Automatic w/OD||Manual w/OD|
|Detailed Spec Comparison|
|2017 BMW 4-Series vs. 2017 Mercedes-Benz C Class||2017 BMW 4-Series vs. 2017 Porsche 718|