Now available at Sytner Nottingham is ALPINA GB’s specially commissioned B4 Convertible press car. This was a bespoke order built to showcase the best of ALPINA’s exclusive craftsmanship and world-beating engineering to the world at Goodwood Festival of Speed and has subsequently received great acclaim from the motoring press.
One of only six in the UK, it’s presented in Mineral Grey, a metallic shade dark enough to become the timeless class and elegance of the ALPINA, while being light enough to showcase the exquisitely sharp yet shapely swage lines that mark the B4 out among the best proportioned GTs currently available. ALPINA specific details include the full side stripe deco-set (easily removed to taste), quad Akropovic exhaust tips that emit a refined yet purposeful burble, and a fully wind tunnel developed ALPINA aero-kit, comprising front chin spoiler, rear diffuser and a discreet roof mounted spoiler. Combining form and function to aid safety and fuel efficiency, lift is reduced by 70 percent at the front and 40 percent at the rear. The exterior is completed by 20” ALPINA Classic light alloy wheels shod in Michelin Pilot Supersport tyres. These aren’t run-flats and as such provide significant advantages in ride comfort, turn in and noise levels compared the standard fit BMW items.
The interior is by far the most sumptuously appointed of any B4 Convertible in the UK, boasting not only smooth and lightly treated Opal Merino hide on the eminently supportive and heated seats and door panels, but a full leather lower dash, top roll and door caps. A visual and texture contrast is provided by the alcantara clad steering wheel, while the trims that would normally be wood have again been upholstered in alcantara by the ALPINA Saddlery. These elements combine to create an airy and accessible yet sophisticated and bespoke ambience in which to pass time and miles. Further ALPINA enhancements to the interior include a unique numbered build plaque adoring the centre console, signature blue dials and headrests embossed with the ALPINA roundel by the Saddlery at Buchloe. Similarly, the green and blue hand stitching on the wheel reminds the driver he is piloting something very different from the norm.
The B4’s real showpiece however, is the thoroughness of its engineering. ALPINA’s engineering team of 70 developed the D5 over two years, using a combination of existing BMW parts where suitable and developing their own when not. The brakes for example, utilise Brembo callipers and a pad compound specially developed by ALPINA to combine optimum feel and stopping power from cold. The engine features two ALPINA-specific twin-scroll turbochargers that work in parallel, while the intake was optimised for high, unrestricted induction rates. The pistons are forged Mahle items and the cam has extensive revisions. To cope with the extra heat generated and the stresses of running for a tank of fuel at a time at 180+ mph, the cooling package was significantly uprated and now boasts a dedicated oil cooler, secondary radiator and 30 percent larger primary radiator, in addition to an innovative intercooler arrangement. ALPINA specific engine management software complements and optimises these changes, with the uprated torque converter and solenoids in the eight speed gearbox ensuring progress is smooth, effortless and reliable. ALPINA have re-engineered the adaptive suspension with B4-specific spring rates and Bilstein dampers, calibrated for an extra-cossetting ride in Comfort and even sharper handling in Sport. All modes however are superbly resolved and lend the D5 the long distance comfort of a luxury limousine combined with a deftness of handling usually associated with Italian exotica.
The B4 appeals to the head as well as the heart, easily managing over 30 mpg (officially 35.3), emits just 186 g/km of CO2, while strong residuals make for a very attractive total cost of ownership. Not bad for a spacious convertible that will accelerate to 62 mph in 4.5 seconds and exceed 185 mph…
To arrange a viewing, please contact ALPINA GB Brand Manager Gary Lott on 0115 934 1414.