The Mercedes-Benz C63 AMG is a strong alternative to the BMW M4, as toe-to-toe, we preferred the Mercedes over the previous-generation M3 coupe in many respects.
Whether the next generation of the AMG C-Class will be able to bring the same level of fight to the new M4 remains to be seen.
Audi's RS5 is another possible pick in the high-performance sport-luxury coupe segment, bringing with it quattro all-wheel drive and the breathtakingly gorgeous lines shared by all A5-based models.
On the track, or otherwise at the limit, the RS5 may lack some of the bite of the alternatives, but it's by no means a slouch.
The Cadillac CTS-V coupe is in its final run; it's a reasonable alternative to the M4 if you can find one, but it's going away, to be replaced by the ATS-V.
Finally, Porsche's Cayman and Boxster are some of the most brilliant-handling machines in this set, especially in S trim.
They're our pick in this set, and the true sports cars among these entries, too.
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|2015 BMW M4Browse Used Listings||2015 Audi A5Browse Used Listings||2015 Cadillac CTS-VBrowse Used Listings||2015 Mercedes-Benz C ClassBrowse Used Listings||2015 Porsche BoxsterBrowse Used Listings||2015 Porsche CaymanBrowse Used Listings|
|17 MPG City / 26 MPG Hwy||21 MPG City / 32 MPG Hwy||14 MPG City / 19 MPG Hwy||13 MPG City / 34 MPG Hwy||19 MPG City / 30 MPG Hwy||19 MPG City / 30 MPG Hwy|
|Twin Turbo Premium Unleaded I-6||Intercooled Turbo Premium Unleaded I-4||Gas V8||Intercooled Turbo Premium Unleaded I-4||Premium Unleaded H-6||Premium Unleaded H-6|
|Subcompact Cars||Subcompact Cars||Subcompact Cars||Compact Cars||Two-Seaters||Two-Seaters|
|2-Door Coupe||2-Door Coupe Manual quattro 2.0T Premium||2-Door Coupe||4-Door Sedan C 300 Luxury RWD||2-Door Roadster||2-Door Coupe|
|Rear Wheel Drive||All Wheel Drive||Rear Wheel Drive||Rear Wheel Drive||Rear Wheel Drive||Rear Wheel Drive|
|Coupe||quattro Coupe||2 Door Coupe||Sedan||Convertible||Coupe|
|Manual w/OD||Manual w/OD||Manual||Automatic w/OD||Manual w/OD||Manual w/OD|
|Detailed Spec Comparison|
|2015 BMW M4 vs. 2015 Audi A5||2015 BMW M4 vs. 2015 Cadillac CTS-V||2015 BMW M4 vs. 2015 Mercedes-Benz C Class||2015 BMW M4 vs. 2015 Porsche Boxster||2015 BMW M4 vs. 2015 Porsche Cayman|