BMW M5 vs BMW M8: Which Is the Ultimate BMW Performance Car?

BMW M5 vs BMW M8 is one of the most common debates among BMW enthusiasts. When fans argue about the ultimate performance car from Munich, two names always rise to the top: the BMW M5 and the BMW M8. Both are engineering masterpieces. Both carry the legendary M badge. But they serve different purposes, and choosing between them is not as simple as it looks.

In this detailed comparison, we break down everything you need to know: performance figures, daily usability, interior luxury, price, ownership costs and more. By the end, you will know exactly which BMW is right for you. If you are interested in the most focused version of the previous M5, read our full BMW M5 CS review.

Overview: BMW M5 vs BMW M8

The BMW M5 is a high-performance sports sedan that has been the benchmark for fast four-door cars for decades. The BMW M8, on the other hand, is BMW’s flagship grand tourer, offered as a two-door coupe, a convertible and a four-door Gran Coupe, combining breathtaking performance with an opulent, luxury-focused experience.

The F90 M5 and the M8 share the same 4.4-liter twin-turbocharged S63 V8 engine and much of their drivetrain technology, but their purpose, driving dynamics and target audience differ significantly. The newest G90 M5 has since moved to a plug-in hybrid V8, which adds a new dimension to the BMW M5 vs BMW M8 comparison.

Engine and Performance

Under the hood, the F90 M5 and the M8 both use BMW’s S63 4.4-liter twin-turbo V8. In Competition form, the two cars are closely matched:

The M8 Competition Coupe edges out the F90 M5 Competition slightly in its official 0-60 time thanks to its more compact two-door body. The new G90 M5 is significantly more powerful than either, but it is also much heavier because of its battery and hybrid hardware, which is why its official sprint time is not quicker.

All three use BMW’s M xDrive all-wheel-drive system with a rear-wheel-drive mode available for experienced drivers, and the 8-speed M Steptronic automatic transmission delivers fast, smooth gear changes.

Design: Sedan vs Grand Tourer

This is where the two cars truly diverge in character. The BMW M5 is a four-door sedan. It looks athletic and purposeful without screaming for attention. The M5 can pass as a business car on a Monday morning and devour a racetrack on a Saturday afternoon. It is the ultimate sleeper, and many enthusiasts love it for exactly that reason.

The BMW M8 is unapologetically dramatic. The long hood, wide hips and sweeping roofline make it one of the most visually striking BMWs ever made. Whether you choose the Coupe, the Convertible or the Gran Coupe, the M8 commands attention wherever it goes.

Interior and Luxury

Both cars offer exceptional interiors, but the M8 takes luxury a step further. Its cabin draws heavily from the BMW 8 Series, featuring Merino leather, a lower, more cocooning seating position and an elegant, driver-focused dashboard.

The M5’s interior is equally high quality but designed around practicality and four-passenger comfort. The rear seats are genuinely usable for adults, something the M8 Coupe simply cannot offer. If you regularly carry passengers, the M5 wins this category easily.

Technology and Driver Settings

Both cars give drivers an unusually wide range of adjustment. Engine response, steering weight, suspension firmness, braking feel and gearshift speed can all be configured individually, and the two red M1 and M2 buttons on the steering wheel store favorite setups for instant recall. This makes it easy to switch from a relaxed commuting mode to a fully focused track setup in a second.

The F90 M5 and the M8 also share BMW’s integrated braking system, which lets drivers choose between a more comfortable or a sportier pedal feel. The newer G90 M5 adds the latest curved display and iDrive software, plus hybrid-specific modes that control how the electric motor and battery support the V8.

Sound and Character

The twin-turbo V8 gives both cars a deep, muscular soundtrack, especially with the M Sport exhaust in its loudest setting. The M8 tends to feel slightly more theatrical, as its coupe body and grand touring character emphasize drama. The M5 feels more understated in everyday driving but just as ferocious when pushed. The G90 M5 can also move silently on electric power for short distances, which adds a completely new side to its personality.

Daily Usability

Here the BMW M5 has a decisive advantage. As a four-door sedan, it is one of the most practical performance cars ever built. You can use it as a family car, a business vehicle and a track weapon in the same week.

The M8 Gran Coupe adds rear doors, but it still sacrifices some rear headroom and trunk space for its stunning silhouette. For long-distance grand touring, however, the M8 is extremely comfortable, quiet and refined on the open highway.

BMW M5 vs BMW M8: Price Comparison

The M8 has always been positioned above the M5 in BMW’s lineup. When both were new, the M8 Competition Coupe and Convertible carried a significant premium over the M5 Competition, and the Gran Coupe sat between them. Today, the new G90 M5 starts at around $120,000 in the US, while used M8 models have depreciated noticeably and can represent strong value.

The M5 delivers almost identical performance at a lower price when comparing new models. The M8 justifies its premium through exclusivity, more luxurious materials and its presence as BMW’s flagship performance model.

Track Performance

On a circuit, the M5 Competition is a sharp, focused tool. Its precise steering, strong brakes and stable chassis make it feel like a true driver’s car despite its size. The G90 M5’s additional electric torque makes it devastatingly fast out of corners, but its extra weight is noticeable on track.

The M8 Competition is also extremely capable, with strong grip and stability, but it is tuned more toward effortless speed and long-distance comfort than aggressive cornering. It is confidence-inspiring through fast sweeping bends but feels heavier when pushed hard through tight turns.

Ownership Costs and Reliability

Because the F90 M5 and the M8 share the S63 V8 and the same transmission, their mechanical ownership experience is similar. Owner communities report that both are generally dependable when serviced on schedule, but running costs are high. Tires, brakes, insurance and fuel are all expensive, and carbon ceramic brakes, if fitted, are costly to replace.

The G90 M5 adds a high-voltage battery and electric motor, so a long warranty or certified pre-owned coverage is especially valuable for buyers who plan to keep the car for many years. With any of these cars, a full service history and a pre-purchase inspection by a BMW M specialist are essential.

Used Market: Which Is the Better Buy?

On the used market, the BMW M5 vs BMW M8 decision becomes even more interesting. Large luxury coupes like the M8 tend to depreciate faster than practical sedans, which means a used M8 Competition can cost less than you might expect for a car with its performance and presence. The F90 M5 Competition and the rare M5 CS, on the other hand, have generally held their value well thanks to strong enthusiast demand.

For buyers focused on value, a well-documented used M8 Gran Coupe offers four doors, luxury and supercar-level speed at a significant discount from its original price. For buyers focused on long-term values and practicality, an F90 M5 Competition remains one of the safest choices in the segment.

Who Should Buy the BMW M5?

• Drivers who want maximum performance in a practical package
• Families who need four usable seats without compromising on performance
• Enthusiasts who plan to track their car occasionally
• Buyers looking for the best performance-per-dollar in BMW’s lineup

Who Should Buy the BMW M8?

• Drivers who prioritize dramatic design and exclusivity
• Grand touring enthusiasts who love long-distance highway driving
• Buyers who want BMW’s most luxurious performance experience
• Those who want a convertible option for open-top driving

To learn more about the F90 sedan, read our full BMW M5 Competition review.

Final Verdict: BMW M5 vs BMW M8

Both the BMW M5 and the BMW M8 are extraordinary machines that represent the best of BMW’s M division. Choosing between them comes down to one question: what do you value more, practicality and versatility, or exclusivity and grand touring luxury?

If you want the most versatile and powerful option, the BMW M5, especially the new G90 hybrid generation, is hard to beat. If you want a showstopper that turns heads everywhere and delivers a more luxurious grand touring experience, the BMW M8 is in a league of its own. Full details on current models are available on the official BMW USA website, and our 2025 BMW M5 G90 review covers the new hybrid M5 in depth.