AC Schnitzer Turns BMW Z4 Into Fire-Breathing Diesel Track Monster
Record-Breaking ACZ4 5.0d Concept Gets Massive Diesel V-8
So you’ve got a few hundred grand lying around and you want to spend it on a supercar, but it’s got to fit in with your Duramax/Power Stroke/Cummins torque monster that it’ll share a garage with. Unfortunately, your options are limited.
Of course, there are the Audi A8 TDI, Mercedes-Benz E250 BlueTEC, and BMW 328d sedan, but those are cars better suited for country-club duty than maximum-attack driving. You could also choose from a wide variety of SUVs made by Jeep, Volkswagen, and many other luxury brands, but again, none of those are sports cars. Alas, the diesel supercar is a veritable unicorn.
That may change, however, if AC Schnitzer (ACS) puts their ACZ4 5.0d into production. The concept, which is based heavily on the BMW Z4, features a massive 5.0L turbodiesel V-8, donated from the European-market Bimmer 550d sedan. However, upgrades to the ACZ4’s exhaust and air management help the big diesel make 430 hp and 620 lb-ft of torque, up from the 5-Series’ 381 hp and 546 lb-ft.
That power, routed to the rear wheels through an eight-speed automatic and limited-slip differential, helps the ACZ4 hustle to 60 mph in less than 4.5 seconds on its way to a top speed of more than 186 mph. Aiding the roadster-turned-supercar in its quest for high performance is an extensive, fully adjustable ACS suspension upgrade, massive brakes, and carbon fiber front and rear spoilers. To reduce weight, the front fenders, roof, and trunklid are made from carbon fiber as well, while ACS Type VIII forged wheels adorn all four corners. The 19-inchers are shod in extremely low-profile 265/30R/19 tires, which provide a wide, sticky contact patch for excellent grip.
In spite of the big, heavy engine, the ACZ4 weighs 289 pounds less than its donor vehicle, thanks in large part to the carbon fiber exterior bits, lightweight exhaust, and elimination of the folding-roof mechanism. All those upgrades help the ACZ4 run the Sachsenring racetrack in Saxony, Germany, faster than any diesel car before it. Carbon racing seats with embroidered ACZ4 logos keep you in place when you’re screaming around corners.
The reborn roadster looks the business, too. Painted a sharp Alpine White with silver and orange graphics, the Z4 is almost subtle, but hunkered over its orange-painted wheels, you know the AC Schnitzer is trouble. Since the power-retractable hardtop has been relegated to the recycle bin, the single-piece roof panel looks much more seamless and graceful, although the twin rear spoilers look a bit tacked on. Inside, the aggressive racing buckets look comfortable and supportive, while coordinated orange accents on the center console, dashboard, and door panels provide some drama for the otherwise-black interior.
ACS anticipates that the ACz4 5.0d would cost about €113,965, or $120,428 at current exchange rates. However, the car is still in the concept stage, and ACS hasn’t announced if it will reach limited production or not. If you want one, you’d better get on the phone with Germany right away and express your intent.
Source: AC Schnitzer