A decade ago, BMW and Mercedes-Benz has gone to six-cylinder base engines for their roadsters; now with better engine technology—especially turbocharging—they're returning to fours.
Like the Z4 28i, the Mercedes-Benz SLK 250 offers strong fuel economy, although the SLK tends to feel a bit bulkier.
The Infiniti G37 is also at the portly end of the scale, although its strong V-6 is an asset.
The Audi TT is more of a sports car in its current generation and is a lean-feeling alternative that costs less.
The Porsche Boxster stands as the most serious sports car in the group, and it's probably the top choice for those who also plan to take their car out on the track once in a while; the only disadvantage of the Porsche is that you get a little more interior noise.
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|2013 BMW Z4Browse Used Listings||2013 Audi TTBrowse Used Listings||2013 INFINITI G37 CoupeBrowse Used Listings||2013 Mercedes-Benz SLK ClassBrowse Used Listings||2013 Porsche BoxsterBrowse Used Listings|
|17 MPG City / 34 MPG Hwy||18 MPG City / 31 MPG Hwy||17 MPG City / 27 MPG Hwy||19 MPG City / 32 MPG Hwy||20 MPG City / 30 MPG Hwy|
|Turbocharged Gas I4||Turbocharged Gas I4||Gas V6||Gas I4||Gas Flat-6|
|Two Seaters||Subcompact Cars||Subcompact||2 Seater||Two-Seater|
|2-Door Roadster sDrive28i||2-Door Coupe S tronic quattro 2.0T Premium Plus||2-Door Journey RWD||2-Door Roadster SLK 250||2-Door Roadster|
|Rear Wheel Drive||All Wheel Drive||Rear Wheel Drive||Rear Wheel Drive||Rear-Wheel Drive|
|Convertible||Coupe||2 Door Coupe||2 Door Roadster||Convertible|
|Manual||Automatic w/Manual Shift||Automatic w/OD||Manual||Manual|
|Detailed Spec Comparison|
|2013 BMW Z4 vs. 2013 Audi TT||2013 BMW Z4 vs. 2013 INFINITI G37 Coupe||2013 BMW Z4 vs. 2013 Mercedes-Benz SLK Class||2013 BMW Z4 vs. 2013 Porsche Boxster|