BMW 640i Gran Coupe Review: Specs, Performance, Ownership

The BMW 640i Gran Coupe stands out as a unique offering in the luxury car segment, combining the sleek silhouette of a coupe with the added utility of four doors. Powered by a potent 3.0-liter turbocharged inline-six engine producing 315 horsepower and 330 lb-ft of torque, this vehicle accelerates from 0-100 km/h in just 5.4 seconds, making it a thrilling choice for those who demand both style and speed. Paired with an eight-speed automatic transmission, it delivers seamless power shifts whether cruising city streets or tackling winding roads.

Design and Exterior Appeal

From the outside, the 640i Gran Coupe captivates with its elongated hood, fastback roofline, and aggressive stance. Measuring over five meters in length and weighing around 1,800 kg, it exudes presence without feeling cumbersome. The rear three-quarter view is particularly striking, highlighting flared wheel arches and distinctive LED taillights that emphasize its sporty character. Available with 19-inch or optional 20-inch wheels via the M Sport package, the exterior trim options like shadowline accents add a premium touch.

This design philosophy positions it as a direct competitor to the Mercedes-Benz CLS and Audi A7, offering a more coupe-like profile than traditional sedans. BMW markets it as a ‘4+1’ seater, prioritizing style over outright family practicality, which suits buyers seeking a head-turning executive car.

Powertrain and Performance

At the heart of the 640i Gran Coupe is BMW’s renowned N55 3.0-liter twin-scroll turbo inline-six engine. It churns out 235 kW (315 hp) and 450 Nm of torque in some markets, providing effortless mid-range punch that excels in overtaking scenarios. The engine pulls strongly up to its 7,250 rpm redline, paired perfectly with the ZF eight-speed automatic, which shifts smoothly in automatic mode or responds instantly to paddle inputs.

Fuel efficiency stands at around 7.9 L/100 km combined, with EPA ratings of 20/29 mpg city/highway, though real-world figures can dip to 15.7 mpg under spirited driving. For all-season capability, xDrive all-wheel-drive variants enhance traction, hooking up effectively off the line and improving high-speed stability.

Driving Dynamics and Handling

BMW’s ‘Ultimate Driving Machine’ ethos shines through in the 640i Gran Coupe’s chassis tuning. It offers multiple driving modes via the Driving Experience Control system: Eco Pro for fuel savings, Comfort for daily ease, Sport for sharper responses, and Sport+ for maximum engagement. These adjust throttle mapping, gear shifts, steering weight, damper firmness, and even stability control thresholds.

In Sport mode, the steering firms up for precise cornering, while the suspension maintains taut body control without excessive harshness. Reviewers note it’s more agile than the 5 Series and fluid compared to the two-door 6 Series Coupe, with skidpad grip reaching 0.89 g. The ride, however, is firmer than rivals like the CLS, especially with larger wheels or on rough roads— a trade-off for its sporty poise. Brakes deliver excellent feel and stopping power, and the all-wheel-drive option further boosts confidence in wet conditions.

• Agile handling: Nimbler than expected for its size, with responsive steering.
• Mode versatility: Tailor the car’s personality from efficient commuter to track-ready performer.
• Firm ride: Prioritizes dynamics over plush comfort.

Interior Comfort and Technology

Step inside, and the cabin impresses with high-quality leather, accent stitching, and supportive multi-contour seats available as options. The front offers excellent driving position with perfect visibility, while rear space accommodates adults comfortably despite the sloping roofline—better than expected for a coupe-styled car. The middle rear seat suits short trips or children due to limited legroom from climate vents, but door openings are generous.

Technology abounds with standard four-zone climate control, an intuitive iDrive system, and optional features like adaptive dampers and heated elements. The center console houses driving mode selectors, keeping eyes on the road. Boot capacity exceeds 460 liters, with 60/40 split-folding seats for versatility.

Rivals and Market Positioning

In a crowded luxury segment, the 640i Gran Coupe differentiates with its blend of coupe aesthetics and sedan usability. Against the Mercedes CLS, it offers superior handling but concedes some ride comfort. The Audi A7 matches in style but feels less engaging dynamically, while the Porsche Panamera prioritizes outright performance at a higher price.

Priced as a premium option, it’s a bargain in the used market today, especially with its durable N55 engine and luxurious features.

Practicality and Ownership

Daily usability is strong, with a massive trunk and supportive seats for long hauls. Maintenance follows BMW norms, but the reliable powertrain keeps costs reasonable. Owners praise its responsive handling and power delivery, noting a ‘tangible heft’ that inspires confidence.

Pros and Cons

• Pros: Stunning design, powerful engine, engaging drive modes, premium interior, strong acceleration.
• Cons: Firm ride on poor roads, limited middle rear space, higher fuel use when driven hard.

FAQs

Is the BMW 640i Gran Coupe a true five-seater?

No, it’s best as a 4+1, with the center rear seat suitable for short trips only due to space constraints.

How does the fuel economy compare?

Expect 7.9 L/100 km combined, with real-world variance based on driving style—better in Eco Pro mode.

What’s the top speed and acceleration?

0-100 km/h in 5.4 seconds, with a governed top speed around 250 km/h.

Is xDrive worth it?

Yes, for improved traction and stability, especially in adverse weather.

How reliable is the N55 engine?

Highly regarded for durability when maintained properly.

Final Verdict

The BMW 640i Gran Coupe remains a compelling choice for drivers prioritizing style, performance, and driver involvement. Its turbo-six power, adjustable dynamics, and elegant lines make it a standout, even years after production. Ideal for enthusiasts who want more than a standard sedan without sacrificing usability.