The A4 sedan remains embroiled in a longstanding rivalry with the Mercedes-Benz C-Class and BMW 3-Series, but the Cadillac ATS is a strong new rival that deserves attention.
The Cadillac ATS is GM's best small luxury car ever, with remarkable handling and the top-notch CUE infotainment system.
The BMW 3-Series is still the most popular with the traditional crowd of driving enthusiasts, though the latest 3-Series has become heavier and quite a bit more expensive; its turbocharged inline-six offers brilliant power, however.
The C-Class received some extensive changes for 2012, including a new base turbocharged four-cylinder engine in the C250, so it's now pretty much up to snuff with the A4's more fuel-efficient sensibilities.
The Infiniti G37 is an interesting alternative, sporting BMW-like handling and matching it with Japanese design flair, but it can feel a bit coarser with respect to road noise and powertrain refinement.
Acura's TL is worth considering, too, for its somewhat roomier backseat, composed ride, and surprisingly good handling, especially in all-wheel-drive versions.
Get FREE Dealer Quotes
|2013 Audi A4Browse Used Listings||2013 Acura TLBrowse Used Listings||2013 BMW 3-SeriesBrowse Used Listings||2013 Cadillac ATSBrowse Used Listings||2013 Mercedes-Benz C ClassBrowse Used Listings|
|20 MPG City / 32 MPG Hwy||17 MPG City / 29 MPG Hwy||17 MPG City / 36 MPG Hwy||18 MPG City / 33 MPG Hwy||15 MPG City / 31 MPG Hwy|
|Turbocharged Gas I4||Gas V6||Turbocharged Gas I4||Gas I4||Turbocharged Gas I4|
|Compact Cars||Mid-Size||Compact Cars||Compact||Compact|
|4-Door Sedan CVT FrontTrak 2.0T Prestige||4-Door Sedan Automatic 2WD||4-Door Sedan 320i RWD South Africa||4-Door Sedan 2.5L RWD||4-Door Sedan C 250 Sport RWD|
|Front Wheel Drive||Front-Wheel Drive||Rear Wheel Drive||Rear Wheel Drive||Rear Wheel Drive|
|Sedan||Sedan||Sedan||Sedan||4 Door Sedan|
|Continuously Variable Ratio||Automatic w/Manual Shift||Automatic w/Manual Shift||Automatic||Automatic|