BMW M5 F90 vs Mercedes-AMG E63 S: Comparing German Super Sedans

Introduction

The BMW M5 (F90 body) and Mercedes-AMG E63 S are two legendary German supersedans that embody extreme power and luxury. It is especially interesting to compare models from the same production year, such as 2021, when both manufacturers refreshed these cars. In 2021, BMW carried out the M5 facelift (LCI), while Mercedes introduced the updated E63 S (W213 Mopf). Both cars are equipped with twin-turbo V8 engines, all-wheel drive, and the latest driving technologies. Let’s take a closer look at their technical specifications, performance, pricing, and other aspects to find out which one leads on paper and on the road.

Comparison of Technical Specifications

For clarity, the main technical specifications of the BMW M5 F90 and Mercedes-AMG E63 S 2021 model year are presented in the table below. Both cars share many similarities, but there are also important differences in power, acceleration, and other parameters.

Note: Power in hp is given in metric horsepower. Acceleration data are approximate factory and tested results. Both cars feature all-wheel-drive systems with the ability to disconnect the front axle for drift mode. Fuel consumption is shown according to the EPA (US) standard for comparison; actual figures may vary.

Prices (USA, Europe, Ukraine)

The high-performance luxury sedan market naturally comes with high prices. Let’s look at the approximate cost of the BMW M5 and Mercedes-AMG E63 S in 2021 across different markets:

• USA: The base price of a new 2021 BMW M5 started at around $103,500, and the M5 Competition at about $110,000 (MSRP). The Mercedes-AMG E63 S started at around $107,500. Thus, in the US both models had a similar price range of about $105–110k.
• Europe: In Germany and most European countries, these models cost approximately €120–130k new (including taxes). In the UK, for example, the Mercedes E63 S was priced at £89,330, and the BMW M5 at around £89,645, which is roughly €100–110k excluding VAT. Prices varied depending on configuration and options.
• Ukraine: On the Ukrainian market, due to taxes and import duties, new M5 or E63 S models would cost over $150k. Many cars are imported used from the US. According to auto portals, used 2021 BMW M5s in Ukraine were offered in the range of ~$72,000 to $149,000 (about 3.0–6.2 million UAH) depending on condition and mileage. The average price was around $100,000 (~4.3 million UAH). The Mercedes-AMG E63 S on the secondary market has a comparable price, slightly varying by configuration and vehicle history.

Thus, in terms of cost, both cars belong to the same segment and depend more on the specific market and condition. Buyers in Ukraine often consider importing from abroad, as the official price of new cars is very high.

Tuning Potential

Both the BMW M5 F90 and Mercedes-AMG E63 S have significant strength and performance reserves, offering great tuning potential. The stock 0–100 km/h acceleration is already around 3.3–3.4 seconds, but enthusiasts and tuning studios can further improve these figures. Let’s look at each model’s potential:

BMW M5 F90: The 4.4-liter S63 engine is known for its flexibility in increasing power. Without major modifications, a Stage 1 remap can add +100 hp – up to ~700 hp and ~850 Nm. For example, G-Power tuning packages allow ~740 hp on stock turbos (without particulate filters in the exhaust, as in US markets). Deeper tuning with hardware upgrades yields impressive results: Stage 2 – around 780 hp and 950 Nm, Stage 3 – up to 820 hp and 1000 Nm of torque. With such upgrades, the M5 can accelerate 0–100 km/h in under 3 seconds (~2.9 s recorded) and exceed 330 km/h top speed. Importantly, the M5’s chassis and transmission can handle such loads, although long-term reliability under extreme tuning depends on build quality and maintenance.

Mercedes-AMG E63 S: The 4.0-liter twin-turbo V8 from AMG (code M177) also responds well to tuning. The renowned Brabus offers the “Brabus 800” kit for the E63 S, increasing power from ~612 hp to 800 hp and torque to 1000 Nm. After such an upgrade, 0–100 km/h drops to ~3.0 s (vs ~3.4 s stock), and the top speed limiter is removed, reaching ~300 km/h. Other tuners (Renntech, AC Schnitzer, etc.) also offer ECU remaps, upgraded turbos, exhaust, and intercoolers. Results are similar – easily exceeding 700–750 hp without sacrificing reliability if serviced properly. It’s worth noting that tuning the E63 S requires attention to its complex suspension (air elements) and electronics – excessive power increases may require brake and suspension upgrades to maintain balance.

Thus, both supersedans have huge tuning potential. With the right budget and expertise, they can be turned into true “supercar killers” while retaining sedan comfort and practicality. There are even projects where M5 Competition and E63 S were pushed beyond 800+ hp, allowing them to compete with hypercars in straight-line races.

Maintenance and Reliability

High-performance cars require particularly careful maintenance. Both the BMW M5 and Mercedes-AMG E63 S feature complex technology that lasts long with proper care, but misuse or saving on service can lead to issues. Let’s look at the reliability and maintenance specifics of each model:

BMW M5 (F90): Modern versions of the S63 engine are much more reliable than earlier ones, though previous generations had known issues. Earlier, premature wear of rod bearings (especially under aggressive high-rpm driving) and turbocharger failures due to overheating or oil starvation were noted. In the F90 version, most of these problems were resolved – improved cooling, materials, and bearing design. However, basic rules remain: frequent oil changes (more often than the ~10k km interval, ideally every 5–7k km under spirited driving), monitoring oil level (S63 can consume oil under load), and timely replacement of spark plugs and ignition coils (they operate under high stress). Owners also note that to prolong turbo life, it’s best to let the engine cool after hard driving (avoid shutting off a hot engine immediately). The M5’s suspension is strong (adaptive dampers), but rough roads can cause premature wear of bushings and shocks – repairs are costly. Overall, with proper care, the M5 F90 shows high reliability for a 600-hp car – many owners drive tens of thousands of kilometers without major issues.

Mercedes-AMG E63 S (W213): The M177 (4.0 V8 Biturbo) engine is also considered reliable but has its quirks. One common owner complaint is increased oil consumption. Under spirited driving, the engine can use noticeable amounts of oil, so regular level checks and top-ups are necessary. This is due to design (thin piston rings for reduced friction) and high turbo temperatures. Another potential issue is turbo lifespan: like BMW, the two turbos located in the “hot V” operate under heavy load. If oil changes are delayed or poor-quality oil is used, turbo bearing wear may occur. Symptoms include whistling, exhaust smoke, and power loss. Additionally, with direct injection, carbon buildup on intake valves can occur over time, affecting performance (solved by walnut blasting). The 9-speed AMG Speedshift MCT gearbox handles 850 Nm but also requires maintenance – oil changes every ~60k km are recommended, especially with frequent track use. The AMG Ride Control air suspension provides comfort and handling benefits but may need attention over time: air struts can lose pressure or the compressor may fail. Signs include body sagging, uneven height, or suspension errors on the dashboard. Repairing air struts or compressors is expensive, so owners should be prepared for such costs at 50–100k km. Both cars come with powerful steel brakes, but heavy use (track) can cause fast wear; optional carbon-ceramic brakes are more durable but very costly. Overall, the Mercedes E63 S is reliable with proper service – owners note that the chassis and engine handle high loads well. Timely maintenance (including costly oil, spark plug, and filter changes) ensures consistent performance without failures.

Maintenance costs: Service for these models is significantly more expensive than for mass-market cars. For example, in the UK, manufacturers offered service packages: M5 – ~£999 for 3 years, E63 S – ~£1,620 for 3 years. In Ukraine, official maintenance is also costly: an oil change alone can cost several hundred dollars due to ~9 liters of premium synthetic oil and filters, while scheduled service (brakes, fluids, etc.) easily exceeds $1,000. Therefore, future owners should budget substantial funds for upkeep.

Owner Reviews and Expert Opinions

Both cars received positive reviews from automotive journalists and enthusiasts. Reviewers note that the BMW M5 and Mercedes-AMG E63 S go “neck and neck” in performance, and the choice largely depends on personal preference. Here are some quotes and summarized opinions:

• Auto Express (UK): In a 2021 comparison test, placed the BMW M5 first, noting that the M5 is “faster and more comfortable, with a slightly broader range of abilities,” while the E63 S is “more charismatic, with an exciting sound.” Conclusion: the M5 narrowly edged out its rival overall, though both were called “brilliant” cars.
• Car and Driver: Rated the 2021 M5 at 9.5 out of 10. The review praised the BMW’s incredible acceleration and luxurious interior, noting as a downside that the M5’s character is less “wild” than the AMG’s. Quote: “The M5 isn’t as rowdy or loud as the E63 S.” In other words, the Mercedes delivers more emotional sound and drama, while the BMW offers a more restrained look and tone – a plus for some, a minus for others.
• Owner feedback: Forum users are also divided. One owner who tested both models wrote: “Both cars are fantastic. The E63 S feels more engaging when driven at 30–90% of its potential, while the M5 is more comfortable in daily city driving and at the limit.” In short, the AMG thrives on emotion during spirited driving, while the M5 is easier to live with daily and feels confident both in the city and on track.
• Brakes and handling: Some experts note that the E63 S has sharper steering with better feedback, while the M5’s steering feels slightly artificial. On the other hand, the M5 absorbs bumps better and is more comfortable on rough roads (thanks to its standard suspension), while the AMG is stiffer even in comfort mode due to 20-inch wheels and air suspension. Both deliver excellent braking; tests show similar 100–0 km/h stopping distances, though some drivers subjectively praise the Mercedes brakes for consistency under repeated hard stops.

Overall, both journalists and owners agree that these two models represent the pinnacle of engineering in the sports sedan class. The BMW M5 focuses more on combining business-class comfort with explosive performance, while the Mercedes-AMG E63 S captivates with emotion and the spirit of a sports car in a sedan body. The choice often comes down to which driving style and image suit the buyer best.

Conclusion: Which Model Suits Whom?

Summing up this comparison, it’s safe to say there’s no wrong choice between the BMW M5 F90 and Mercedes-AMG E63 S – both offer stunning performance and luxury. However, there are nuances that may tilt the balance depending on the owner’s preferences:

• BMW M5 F90 is better suited for those seeking a more understated and comfortable supersedan for everyday use. The M5 has a slightly softer suspension (compared to AMG) in comfort mode, a less aggressive exhaust note, and an elegant design that doesn’t draw too much attention. At the same time, it’s phenomenally fast – acceleration and handling rival sports cars. It also features a modern interior with BMW’s latest tech (Live Cockpit, iDrive, etc.) and is reportedly slightly cheaper to maintain. This model is often chosen by those who value versatility: commuting, long family trips, and the ability to enjoy track days or spirited drives. If you appreciate precision, balance, and effortless speed – the M5 is an excellent choice.
• Mercedes-AMG E63 S appeals to drivers who value a bold character and sporty atmosphere. This sedan exudes AMG spirit: the roaring V8, aggressive styling with flared arches and the signature Panamericana grille, and a stiffer suspension that keeps the car planted. The E63 S is often chosen for the emotions it delivers – every acceleration is accompanied by a rich sound and exhaust pops, and the steering provides more road feel. Moreover, the Mercedes interior offers a bit more luxury and classic elegance (Nappa leather, Alcantara, large MBUX screens). This car is for those who want to stand out and get maximum adrenaline from every drive, even if it means a firmer ride and more frequent fuel stops. If you dream of a “four-door muscle car” with business-sedan intelligence – the AMG E63 S is made for you.

In conclusion, choosing between the M5 and E63 S is a choice between two sides of perfection. For the pragmatic driver who wants to balance daily comfort and performance while staying under the radar – the BMW M5 is the ideal partner. For the charismatic leader who wants every drive to express a passion for speed and style – the Mercedes-AMG E63 S becomes an extension of their personality. Whichever sedan you choose, you’ll own a car that delivers excitement on every kilometer of the journey.