In a straight-line speed comparison, the BMW M340i is typically faster than the Audi S5, especially when equipped with all-wheel drive. The Audi remains a very quick and capable performer, but the M340i usually posts quicker 0–60 times while offering similarly impressive overall performance depending on the configuration.
Performance comparison
We break down power, drivetrains, acceleration, and top speed to show how the two carsStack up on the road and on the clock.
Powertrains and output
The M340i uses a turbocharged 3.0-liter inline-six with about 382 horsepower and 369 lb-ft of torque, paired with an eight-speed automatic. It can be ordered with rear-wheel drive or BMW’s xDrive all-wheel drive. The S5 uses a turbocharged 3.0-liter V6 with about 349 horsepower and 369 lb-ft, paired with an eight-speed Tiptronic and Audi’s quattro all-wheel drive. Top speed on both cars is electronically limited to 130 mph in base form, with a Dynamic/Driver’s Package raising that limit to 155 mph for higher-speed highway runs.
- BMW M340i: 382 hp, 369 lb-ft; 8-speed automatic; available as rear-drive or xDrive; top speed 130 mph (155 mph with M Driver’s Package).
- Audi S5: 349 hp, 369 lb-ft; 8-speed Tiptronic; quattro all-wheel drive; top speed 130 mph (155 mph with Dynamic Package).
In terms of engine character, the M340i’s inline-six is known for a strong mid-range shove and a notable punch when you want it, while the S5’s V6 delivers a smoother, deeper tone with a more linear power delivery. Drivetrain choice also matters: BMW’s xDrive can maximize grip and acceleration in wet or slippery conditions, whereas Audi’s quattro emphasizes consistent grip and confidence across a wider range of surfaces.
Acceleration and top speed
The figures below reflect typical US-market configurations and testing conditions for current-generation models. They illustrate how quickly each car can accelerate to 60 mph and what the top-speed ceiling looks like with and without optional packages.
- BMW M340i xDrive: 0–60 mph in about 3.8–4.1 seconds; top speed 130 mph (155 mph with M Driver’s Package).
- Audi S5 quattro: 0–60 mph in about 4.4–4.5 seconds; top speed 130 mph (155 mph with Dynamic Package).
Bottom line: in straight-line sprinting, the M340i typically beats the S5 by a clear margin, especially when equipped with xDrive and proper tires. The S5 remains very quick and offers a refined, comfortable surge, particularly with the quattro setup in play and the Sportback’s taller gearing for daily usability.
Drivetrain, handling, and daily usability
Beyond raw numbers, the driving experience and practicality matter. The M340i’s combination of power, sharper steering, and the choice between a lightweight rear-drive chassis or the confident grip of xDrive tends to deliver a more energetic sport-sedan feel. The S5, with its quattro system, provides steady cornering grip and a balanced ride quality that appeals to daily drivers who value smoothness and all-weather capability. The M340i’s sportier handling tuning may feel more aggressive to enthusiasts, while the S5 emphasizes a refined, composed demeanor in everyday use.
Practicality and daily use
For many buyers, practicality can sway the decision as much as speed. The M340i is a traditional sedan with a conventional trunk, whereas the S5 is also offered as a Sportback, giving it a larger cargo area and easier access to rear storage thanks to its hatch. If you regularly haul gear or groceries, the S5 Sportback’s layout can be a meaningful advantage; if you prefer a purer sedan silhouette and sport-sedan focus, the M340i is hard to beat.
- M340i (sedan): conventional trunk, sporty sedan balance, strong on-road dynamics, available with xDrive.
- S5 (Sportback): hatchback practicality, larger cargo opening, sturdy all-wheel drive, refined daily comfort.
In summary, if outright quickness and a sportier throttle character matter most, the BMW M340i generally wins the drag race. If you value everyday practicality, smooth power delivery, and a roomy cargo area, the Audi S5 Sportback remains a compelling alternative with closely matched performance in most driving scenarios.
Summary
The BMW M340i is typically faster in acceleration thanks to its higher horsepower and flexible xDrive setup, delivering a stronger straight-line kick than the Audi S5. The Audi S5 counters with strong grip, a refined power delivery, and, in the Sportback form, greater cargo practicality. Your choice depends on whether you prioritize blistering speed and a sharper sport-sedan feel (M340i) or everyday comfort and practical versatility (S5 Sportback).