Alpina D4 Review: Diesel Grand Tourer With 350 Bhp Performance

The Alpina D4 stands out as a masterful fusion of diesel practicality and high-performance dynamics, transforming the BMW 4 Series into a refined yet ferocious machine. Tuned by Alpina, this model delivers the kind of acceleration and composure typically reserved for BMW’s M division, but with the added benefits of lower fuel costs and a more understated presence on the road.

Engineering Excellence Under the Hood

At its core, the Alpina D4 builds upon the robust BMW 435d platform, enhancing its 3.0-liter straight-six diesel engine to produce 350 horsepower and a staggering 700Nm of torque. This power upgrade comes courtesy of Alpina’s meticulous tuning, including larger turbochargers and optimized fuel mapping, without compromising reliability. Paired exclusively with an eight-speed Switchtronic automatic transmission, the powertrain ensures seamless shifts and effortless overtaking, even on motorways where the broad torque band shines brightest.

Performance figures are impressive: 0-62mph in under 4.6 seconds for the coupe variant, with a top speed electronically limited to around 173mph. The diesel’s sporty exhaust note adds character, distinguishing it from mundane oil-burners while maintaining refinement at cruising speeds.

Chassis Dynamics and Ride Quality

Alpina’s suspension revisions are pivotal to the D4’s appeal. Retuned springs, dampers, and anti-roll bars, combined with stiffer bushings, deliver a firm yet controlled ride that absorbs imperfections without feeling harsh. The rear-wheel-drive layout preserves BMW’s signature balance, allowing precise cornering with minimal body roll. Even on 20-inch alloys shod with low-profile tires, the setup remains composed, though some tire roar is evident at higher speeds.

The convertible version introduces compromises due to its retractable hardtop, adding weight and a touch of chassis flex under hard cornering. Nonetheless, it remains engaging, with strong grip from the wide tires and responsive steering that communicates road feedback effectively.

Design and Aesthetic Appeal

Unlike the aggressive styling of the BMW M4, the Alpina D4 opts for subtlety. A discreet bodykit with aerodynamic front splitter, side skirts, and a subtle rear diffuser enhances airflow without shouting for attention. Signature 20-inch multi-spoke alloys fill the arches dramatically, while Alpina badging and metallic blue mirror caps add exclusivity. Available as a coupe or convertible, both body styles retain the elegant lines of the 4 Series, making the D4 a sleeper hit among enthusiasts.

• Front fascia: Sleek LED headlights and a wider intake for improved cooling.
• Side profile: Flared wheel arches and aerodynamic sills for stability.
• Rear end: Quad exhaust tips integrated into a diffuser, hinting at the power within.

Interior Refinement and Comfort

Step inside, and the cabin exudes premium quality derived from the BMW 4 Series, elevated by Alpina touches. Blue instrument dials glow vividly, a hand-stitched leather steering wheel offers perfect grip, and a numbered plaque on the dashboard underscores its limited-production status. Lavish leather upholstery, Alcantara inserts, and wood or carbon-fiber trims create a bespoke atmosphere.

Space is generous for front occupants, with supportive sports seats featuring ample adjustment. Rear seating accommodates adults for short trips, though the coupe’s sloping roofline limits headroom. The convertible’s hardtop folds quietly in 20 seconds, maintaining trunk usability better than many rivals.

Fuel Efficiency and Running Costs

One of the D4’s strongest suits is its economy. Official figures claim up to 53mpg on combined cycles, with real-world tests yielding 41mpg overall, 36mpg urban, and 44mpg extra-urban. This efficiency stems from the diesel’s inherent frugality, Alpina’s aerodynamic tweaks, and the slick eight-speed gearbox. CO2 emissions hover around 160g/km, placing it in a favorable tax bracket compared to petrol supercars.

At nearly £10,000 less than the M4, the D4 offers better value. Maintenance follows BMW schedules, but Alpina’s warranty and specialist service network provide peace of mind.

Driving Experience: Track vs. Daily Duties

On twisty B-roads, the D4 excels with its rear-drive poise and torque vectoring. Launch control propels it forward with authority, while the stability systems allow playful slides if desired. For long hauls, adaptive cruise and heated seats make it a superb GT, with low noise levels and compliant cruising.

Drawbacks include fiddly paddle shifters behind the wheel and some wind noise in the convertible at speed. Yet, these are minor compared to the overall package.

Performance Specifications at a Glance

Market Position and Rivals

The D4 slots between hot hatches and supercars, rivaling the Audi RS5, Mercedes C63, and BMW M4. Its diesel edge provides unmatched range—over 800 miles per tank—ideal for UK drivers facing high fuel prices. Alpina’s exclusivity appeals to those seeking something rarer than M badges.

Ownership Verdict

Pros: Explosive performance, superb economy, refined interior, value for money.
Cons: Convertible chassis flex, paddle shifter ergonomics, tire noise.

Overall, the Alpina D4 is a triumph, proving diesel still has a place in performance cars. It’s the M4 alternative BMW should build.

Frequently Asked Questions

Is the Alpina D4 faster than the BMW M4?

The D4 matches the M4’s acceleration with 0-62mph in 4.6 seconds, but offers better torque for real-world use.

What is the fuel economy of the Alpina D4?

Expect up to 53mpg combined, with real-world figures around 41mpg.

Does the D4 come with four-wheel drive?

No, it’s rear-wheel drive only, enhancing its dynamic purity.

How reliable is the Alpina D4?

Built on proven BMW components with Alpina upgrades, it inherits excellent reliability backed by specialist support.

What’s the price difference versus the M4?

The D4 saves nearly £10,000, combining performance with diesel savings.