For most of the last decade, the debate over the ultimate compact performance car came down to two names: the BMW M3 and the Audi RS4 Avant. That rivalry has quietly changed shape. Audi has retired the RS4 nameplate, and its successor — a new-generation RS5, offered as both a sedan and an Avant wagon — swaps the old car’s turbocharged V6 for a plug-in hybrid setup with nearly 630 horsepower. The M3, meanwhile, keeps doing what it has always done, just with more power than ever. Here is how the two currently stack up, and why the comparison is not as simple as it used to be.
Two very different approaches to power
The current BMW M3 is built around the S58, a 3.0-litre twin-turbocharged inline-six that has become one of the defining engines of the modern performance era. In the U.S. lineup, the base rear-wheel-drive M3 makes 473 horsepower and 406 lb-ft of torque, the M3 Competition steps up to 503 hp and 479 lb-ft, and the all-wheel-drive M3 Competition xDrive tops the range at 523 hp with the same 479 lb-ft. It is a straightforward, purely combustion approach, and one reason the turbocharging trade-offs that shape modern performance engines matter so much to how the M3 actually drives.
Audi has gone a different way entirely. The new RS5 pairs a 2.9-litre twin-turbo V6, producing 503 hp on its own, with an electric motor built into its eight-speed automatic transmission that adds another 174 hp. Combined output lands at roughly 630 hp and 609 lb-ft of torque — figures that put it well ahead of even the xDrive M3 on paper. A 25.9-kWh battery (22 kWh usable) allows up to 52 miles of electric-only range on the WLTP cycle, so the RS5 can just as easily be a near-silent commuter as a 600-plus-horsepower Autobahn missile.
Performance numbers
On paper, the RS5’s power advantage translates into a modest edge in a straight line. Audi quotes 0-60 mph in 3.6 seconds for the new RS5, with a top speed of 155 mph standard or 177 mph with the optional Audi Sport package. BMW quotes 3.4 seconds to 60 mph for the M3 Competition xDrive, 3.8 seconds for the rear-wheel-drive Competition, and 4.1 seconds for the base manual car — meaning the quickest M3 is essentially in the same window as the heavier, more powerful RS5, despite giving away well over 100 horsepower. That is partly down to weight: the hybrid hardware pushes the RS5 close to 5,200 lbs, hundreds of pounds heavier than even the all-wheel-drive M3.
Handling, drivetrain and the weight question
Both cars now default to all-wheel drive at their most powerful. The M3 Competition xDrive uses BMW’s rear-biased AWD system, which can be switched to a pure rear-wheel-drive mode for drivers who want to manage oversteer and understeer themselves rather than let electronics do it. The RS5 relies on Audi’s quattro system with Dynamic Torque Control and an electro-mechanical rear differential, plus adaptive twin-valve dampers to help disguise its extra mass. On paper the Audi should feel more planted in poor conditions and off-throttle transitions, while the lighter M3 — especially in base RWD trim — should feel more adjustable and direct through a corner. Neither approach is objectively “better”; they reflect two different philosophies about what a fast four-door should feel like.
Body styles, and a wagon most buyers won’t get
The M3 is sold in the U.S. as a sedan, with a coupe version (the M4) covering the two-door market. Audi’s new RS5 is confirmed as both a sedan and an Avant wagon in Europe, continuing the estate-car tradition the RS4 Avant built its reputation on. But Audi has already confirmed the RS5 Avant will not be sold in the United States, echoing the fate of every RS4 Avant before it. American buyers who want the wagon body style will, once again, need to look at grey-market imports or accept the sedan instead — a familiar disappointment for the enthusiast community that has petitioned Audi for a U.S. wagon for years.
Pricing
The M3 lineup is already on sale in the U.S., starting at $80,475 for the base manual car, $84,675 for the Competition, and $89,775 for the Competition xDrive, according to Kelley Blue Book pricing data. The new RS5 has only been priced for Europe so far: roughly €106,200 for the sedan and €107,850 for the Avant, which converts to somewhere in the region of $126,000–$128,000 at current exchange rates — though that is not a reliable guide to eventual U.S. pricing, and Audi has not confirmed a launch date or sticker price for the American market. Given the outgoing RS5 started around $89,000 in the U.S., a similar starting point for the new hybrid car would put it close to the M3 Competition xDrive, though the added hybrid hardware makes a modest premium likely.
So which one should you want?
If you want a car you can buy today, with a manual gearbox available and a proven formula, the M3 remains the easy recommendation — and the cheaper one, trim for trim. If raw numbers and the idea of a genuinely dual-natured car (silent EV commuter one day, 630-hp hybrid the next) appeal more, the new RS5 is the more ambitious machine, even if its most distinctive body style will stay out of reach for American buyers. It’s also worth remembering that outright power and hybrid sophistication don’t automatically translate into the most engaging drive — for a sense of how a track-focused rival trades outright numbers for driver feedback, our comparison of the Porsche 911 GT3 and GT3 RS is a useful companion read. For now, the M3 vs RS5 rivalry is a genuine one on paper — but until Audi confirms U.S. pricing and availability, BMW gets to have this segment mostly to itself.