BMW 640d Gran Coupe: Diesel Luxury Review Under £20,000

The BMW 640d Gran Coupe stands out as a sophisticated four-door grand tourer that combines striking aesthetics with impressive diesel power. Powered by a twin-turbo 3.0-liter inline-six engine producing 313 horsepower and 630 Nm of torque, it delivers 0-100 km/h acceleration in just 5.4 seconds while maintaining excellent fuel efficiency around 5.5 liters per 100 km in mixed driving. This model bridges the gap between sporty coupes and spacious sedans, offering versatility for daily use and long-distance cruising.

Striking Exterior Design and Proportions

The BMW 640d Gran Coupe measures nearly 5 meters in length with a low-slung profile that exudes elegance and athleticism. Its extended wheelbase provides ample interior space without sacrificing the coupe-like silhouette, featuring a sloping roofline and aggressive front fascia with LED accents. The design emphasizes fluidity, with sculpted lines that enhance its presence on the road. Wide stance and 20-inch alloy wheels contribute to its planted feel, while subtle chrome trims add a premium touch.

• Low roof height preserves feline agility despite generous dimensions.
• Extended rear doors improve access to the back seats.
• Aerodynamic shaping aids efficiency and high-speed stability.

Compared to rivals like the Porsche Panamera or Mercedes CLS, the Gran Coupe’s proportions feel more balanced, avoiding the awkwardness sometimes seen in lifted sedans.

Powertrain Excellence: Engine and Transmission

At the heart is the refined 640d diesel engine, delivering seamless power from low revs thanks to twin turbos. Paired with an 8-speed automatic transmission featuring paddle shifters, it offers lightning-quick shifts and intuitive response. Top speed is electronically limited to 250 km/h, but real-world overtaking is effortless with torque peaking at 1,500 rpm. Fuel economy shines on motorways, often dipping below 6 liters per 100 km, making it ideal for high-mileage drivers.

Drive modes from Eco Pro to Sport+ allow tailoring the experience, with the diesel’s bassy note adding character without excessive noise.

Refined Interior and Comfort

Step inside, and luxury envelops you with high-quality leather, wood inlays, and a driver-focused cockpit. The iDrive infotainment system, complete with a large 10.25-inch screen, navigation, and heads-up display, feels modern even today. Front seats offer multi-way adjustments, heating, and ventilation for all-day comfort. Rear space accommodates adults comfortably, with good legroom and headroom, though the central rear spot is best for shorter trips.

• Spacious cabin rivals the larger BMW 7 Series.
• Quad-zone climate control and ambient lighting enhance ambiance.
• Generous 460-liter boot with practical loading height.

Ergonomics shine, with intuitive controls and excellent visibility forward, though rear three-quarter views could be better.

Dynamic Handling and Ride Quality

Equipped with optional Adaptive Drive, including dynamic dampers and active anti-roll bars, the 640d Gran Coupe handles corners with poise. Rear-wheel steering (Integral Active Steering) tightens the turning circle and boosts stability at speed. The ride is compliant over imperfections yet firm in Sport mode, balancing grand touring comfort with engaging dynamics. It’s wider than a typical sedan, demanding care in tight urban spaces, but on open roads, it excels.

Braking is strong and progressive, with minimal dive under hard stops. While not as razor-sharp as a BMW M car, it outperforms many luxury rivals in fluidity and balance.

Technology and Safety Features

B Loaded with BMW’s ConnectedDrive suite, including adaptive cruise control, lane-keeping assist, night vision, and 360-degree cameras. Parking aids and surround-view make maneuvering the large body straightforward. LED headlights with adaptive cornering provide excellent illumination. Much of this tech is optional, pushing prices up, but it elevates the driving experience significantly.

Practicality for Everyday Use

Despite its glamorous looks, the Gran Coupe proves usable. Rear doors facilitate family access, and the boot swallows weekend luggage easily. Fuel stops are infrequent, and servicing intervals suit high-mileage owners. As a used buy under £20,000, it offers incredible value today, blending rarity with reliability.

Ownership Costs and Rivals

Starting prices were premium, around £70,000 new, but depreciation favors buyers now. Running costs remain low thanks to diesel efficiency and BMW’s robust build. Key rivals include the Audi A7, Mercedes CLS, and Porsche Panamera diesel, but the 640d edges them in value and all-around ability.

Pros and Cons

• Pros: Blistering performance, superb economy, luxurious interior, versatile packaging.
• Cons: High original price, some options pricey, limited rear visibility, width in cities.

Is the BMW 640d Gran Coupe Right for You?

For those seeking a stylish, fast, and frugal executive car, the 640d Gran Coupe delivers without compromise. It’s perfect for long commutes or weekend getaways, offering BMW driving pleasure in a practical four-door body.

Frequently Asked Questions (FAQs)

What engine powers the BMW 640d Gran Coupe?

A 3.0-liter twin-turbo diesel inline-six with 313 hp and 630 Nm torque.

How fuel-efficient is it?

Around 5.5 L/100 km mixed, excellent for motorway cruising.

Is it practical for families?

Yes, with good rear space and a large boot, though best for 4 adults.

What’s the top speed and acceleration?

250 km/h limited, 0-100 km/h in 5.4 seconds.

How does it compare to the Porsche Panamera?

Faster acceleration, better economy, similar luxury at lower used prices.

Common issues to watch for in used models?

Check turbo health, electronics, and suspension bushings; generally reliable.