Alpina B4 Gran Coupe: 488Bhp, 3.7s 0-62mph Grand Tourer
Discover why the Alpina B4 Gran Coupe blends BMW M performance with refined luxury for the ultimate grand tourer experience.
The Alpina B4 Gran Coupe stands as a testament to refined high-performance motoring, transforming the BMW 4 Series Gran Coupe platform into a sophisticated powerhouse. With its BMW-owned tuner heritage, Alpina delivers a vehicle that prioritizes seamless power delivery, opulent comfort, and understated style over raw aggression. This four-door sports sedan accelerates to 62mph in 3.7 seconds, reaches 187mph, and wraps it all in a cabin designed for long-distance cruising.
Powertrain Mastery: A Tuned S58 Heart
At the core of the B4 lies Alpina’s meticulously enhanced version of BMW’s S58 3.0-liter twin-turbo inline-six engine. Smaller turbocharger housings enable quicker spool-up for immediate throttle response, complemented by a bespoke air intake, stainless steel exhaust, and advanced cooling system. The result is 488bhp at 5000-7000rpm and a staggering 538lb ft of torque from 2500-4000rpm—surpassing the M4 Competition’s torque while trading just 15bhp for superior drivability.
This setup pairs with an eight-speed ZF automatic transmission, recalibrated for buttery-smooth shifts across all modes. In Comfort or Comfort Plus, it glides effortlessly; in Sport, it snaps through gears without harshness. Rear-biased xDrive all-wheel drive ensures prodigious traction, making the B4 feel warp-speed quick from any speed, ideal for overtaking or merging onto highways.
| Performance Specs | Details |
|---|---|
| Engine | 3.0L twin-turbo inline-6 |
| Power | 488bhp @ 5000-7000rpm |
| Torque | 538lb ft @ 2500-4000rpm |
| 0-62mph | 3.7 seconds |
| Top Speed | 187mph |
| Weight | 1890kg |
Chassis Dynamics: Balanced for Versatility
Alpina’s Sport Suspension strikes a masterful balance, firm yet forgiving. Adaptive dampers provide composed body control and flat cornering without the crashiness of full M models. On twisty roads, the rear-biased xDrive shines, delivering mighty grip and progressive handling. The steering is meaty and precise, though slightly insulated for grand touring poise.
Uprated brakes deliver massive stopping power with confidence-inspiring feel. Bespoke Pirelli P Zero tires, marked with ALP sidewalls, are optimized for sustained high-speed runs—rear pressures at 3.5bar support the uncapped 187mph top speed. While not as razor-sharp as an M4 on a circuit, the B4 excels as a daily driver that masks road imperfections remarkably well.
Exterior Design: Subtle Sophistication
Alpina eschews M-car aggression for elegant restraint. Classic 20-spoke forged 20-inch wheels fill the arches perfectly, paired with a new rear bumper featuring muscular vents, oval exhaust tips, and a subtle lip spoiler that accentuates the sloping roofline. From behind, it looks fantastic—refined yet purposeful. The front gains a discreet chin spoiler, maintaining the Gran Coupe’s practical four-door usability without shouting its performance credentials.
- Forged Wheels: 20-inch classics for optimal fill and lightweight strength.
- Exhaust: Stainless steel with oval tips for a muffled, purposeful note.
- Diffuser: Compact design complements the aerodynamic profile.
Interior Refinement: A Leather-Lined Sanctuary
Step inside, and the B4 reveals its luxury soul. Lavish leather envelops the cabin, creating a cocooned capsule insulated from road noise. Harmon Kardon audio delivers crystal-clear sound, perfect for Autobahn cruises. Green or blue stitching adds bespoke flair, while supportive seats balance long-haul comfort with secure lateral hold.
Build quality is impeccable, with Alpina’s signature details like the leather dash and precise switchgear. Rear space suits adults for cross-country trips, making this Gran Coupe family-friendly without sacrificing sportiness. It’s a space where you could max out the speedo and still converse effortlessly.
On the Road: Grand Tourer Perfected
Defaulting to Comfort mode, the B4 prioritizes serenity. It soaks up bumps with poise, even on 20-inch wheels, feeling rock-solid at high speeds. Torque abundance means effortless pace-building, with shifts so smooth they encourage relaxed cruising. On B-roads, it’s intoxicatingly quick but not always maximally engaging—insulation trades ultimate tactility for liveability.
Track-capable yet refined, the B4 handles circuits with poise thanks to its chassis tuning and brakes. Daily usability shines: quieter than M rivals, more comfortable for commutes, and versatile for everything from city runs to 1000-mile hauls. Fuel economy? Respectable for the power, aided by efficient turbos.
Pricing and Rivals: Value in Exclusivity
Starting at around £79,900, the B4 undercuts some M4 variants while offering unique Alpina cachet—rarer than BMW specials. Rivals include the BMW M4 Competition (sharper but firmer), Mercedes-AMG C63 (V8 drama), and Audi RS5 Sportback ( Quattro grip). The B4 wins for those seeking M-level thrills with superior refinement.
| Rival Comparison | Power | 0-62mph | Top Speed | Price (est.) |
|---|---|---|---|---|
| Alpina B4 | 488bhp | 3.7s | 187mph | £79,900 |
| BMW M4 Comp | 503bhp | 3.5s | 180mph* | £85,000+ |
| Audi RS5 SB | 444bhp | 3.9s | 174mph* | £75,000 |
Technology and Practicality
BMW’s iDrive infotainment anchors the tech suite, with wireless Apple CarPlay, Android Auto, and a curved display. Adaptive cruise, lane-keeping, and parking aids come standard. The Gran Coupe’s hatchback boot (470 liters) adds versatility, swallowing luggage for weekend getaways. Four doors make it the practical choice over two-door coupes.
Long-Term Ownership: Reliability and Costs
Alpina’s BMW roots promise solid reliability, with enhanced components built for durability. Servicing through BMW dealers keeps costs manageable versus exotics. Resale holds strong due to limited production—expect low-mileage examples to appreciate.
Frequently Asked Questions
Is the Alpina B4 faster than the BMW M4?
In real-world acceleration, yes—the B4’s torque advantage makes it quicker from low speeds, despite slightly less peak power.
How comfortable is the B4 for daily driving?
Exceptionally so, with Comfort Plus mode prioritizing smoothness over sportiness, ideal for long trips.
What’s the fuel economy like?
Around 25-30mpg combined, efficient for 488bhp thanks to turbo efficiency and auto gearing.
Can the B4 handle track days?
Absolutely—strong brakes, grip, and balance make it capable, though it’s more GT than outright racer.
Is Alpina better than BMW M?
For refinement and usability, yes; M cars are purer for track focus.
References
- Alpina B4 Gran Coupe review: the thinking driver’s BMW M4? — Top Gear. 2023. https://www.topgear.com/car-reviews/b4-gc/first-drive
- Alpina B4 Gran Coupé 2023 review — Evo. 2023. https://www.evo.co.uk/alpina/b4/gran-coupe
- BMW ALPINA B4 GT Gran Coupe Review — BMWBLOG (YouTube). 2024. https://www.youtube.com/watch?v=1FTU7H4_YF8
- Here’s What I Learned Driving the ALPINA B3 GT and B4 GT — BMW Blog. 2024-11-19. https://www.bmwblog.com/2024/11/19/alpina-b3-gt-b4-gt-road-track-review/
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