If you're in the market for a quick, glamorous coupé with more than 400bhp, you've likely thought about the Mercedes-AMG C63, Audi RS5 as well as BMW M4. But also for a touch of added exclusivity, you might wish to take into consideration an Alpina B4 S Biturbo.
The B4 S, which supersedes the old B4, is based on the very same straight-six-powered platform as the M4, which has undertaken considerable technical and also aesthetic adjustments, according to Alpina's customs. It suggests the cars and truck is a much more powerful but much less concentrated option to its BMW equivalent.
Under its svelte bonnet is a 3.0-litre 6 based upon the N55 block of food preparation 3 Series as well as 4 Series models, yet it uses twin turbochargers that are 10% larger, a water-cooling system that's 20% bigger and an uprated oil cooler with 35% even more ability. The engine spins a lighter crank that's made from built steel.
Optimum power outcome for the Alpina-fettled N55 peaks at 434bhp at 5500-6250rpm and torque reaches 487lb ft at 3000rpm. Those numbers are 9bhp as well as 81lb feet greater than the M4, although the B4 S, which only includes an eight-speed automated, is 90kg heavier compared to the automobile BMW. Still, that included torque assists the Alpina to speed up from no to 62mph in 4.2 sec, a tenth quicker compared to the M4.
Under the bonnet is where the technological renovations for the B4 S over the B4 end, though: Alpina has stuck to the same suspension settings, suggesting it rests on a little less aggressive springs as well as dampers than its cousin from BMW's M division.
As in the past, the B4 S obtains BMW Professional infotainment as standard, which adds a widescreen sat-nav as well as all-round car park sensors. The car's seats also come covered in Dakota natural leather at no added price, although the automobile you see below includes Merino leather, a ₤ 1285 alternative.
Extremely approachable. From the press of the starter button to the very first prod of the throttle in Sport setting, the B4 S is an accommodating beast. Where the M4 stirs up with a deep-throated grumble, the Alpina, blowing through its standard-fit Akrapovič exhaust, has a subtler, softer voice.
Leave the drivetrain readied to its default Comfort setting as well as the only tip of its possible efficiency comes with the uncomplicated way it shifts the auto's 1690kg mass. The engine hardly steps over 2000rpm throughout regular urban driving as well as the gearbox flicks right into seventh and also 8th remarkably frequently.
The benefit of the N55 swelling's Alpina alterations ends up being clearest when it's readied to Sport setting and also enabled to spin towards the redline. The engine is responsive from low down the rev band and there's an extremely noticeable kick at 3000rpm that's accompanied by a silky in-line six-tone. On upshifts, there's a large insert forward propelled.
Despite its more accelerative powertrain, the Alpina is far better than the M4 in position that power into the tarmac. Where the M4's grunt lands in one eruptive strike that often seems to conquer the grasp available, the Alpina's more flexible motor transfers its power onto the ground with a climbing rise. This indicates you could drive with even more confidence compared to one performs in the edgier M4 as well as it permits you to be much more hostile with the throttle on corner exits.
That's not to claim that the B4 S is faster than its BMW sibling. The M4, with its hunched down body and also substantial weight advantage, turns as well as quits faster. But the Alpina's much less hard-edged suspension resolve folds and also splits in the road better - impressive given that the cars and truck sits on huge 20in Alpina Classic alloys. It makes maintaining a smooth rate along a B-road much easier as well as doesn't require the wide-eyed focus of the M4 on a slippery surface area.
Incorporate this with splendidly regular guiding that feels completely weighted to a cars and truck with this much muscle, plus an extremely receptive gearbox that can be controlled manually using Alpina's change buttons on the back of the wheel, and also you have an automobile that is as complementary as it is compensating to drive.
The elegance of the B4 S has the ability to then call things back to Comfort and also make it possible for the automobile to float along. The dampers loosen their understanding on the body and enable a supported trip - an informing picture of the impacts of the B4 S's more virtuous suspension set-up. It likewise stresses the adaptability on offer from this less concentrated Bavarian coupé.
If there's one thing to whine concerning from behind the wheel, it's the comparative lack of state-of-the-art infotainment on offer, which simply can not equal the Virtual Cockpit in the Audi RS5. Yet while the BMW system is doing not have in theatre, in the Alpina its typically styled attributes, as well as the fitment of conventional dials, probably match the car's more conventional high-end personality.