Bmw Z3 2.5i on 2040-cars

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BMW Concept Roadster has two fewer wheels than we were expecting

The annual Concorso d'Eleganza Villa d'Este on the shores of Lake Como is an opportunity for some of the most beautiful vehicles in the world to descend on one of the poshest places on earth each year. Unsurprisingly, the event is also increasingly the chance for automakers to debut exclusive concepts to some of the wealthiest auto enthusiasts in the world. In the last few years, BMW has become the masters of this annual unveiling with automotive concepts like the Gran Lusso Coupé, BMW Zagato Coupe and motorcycles like the the gorgeous Concept 90, not to mention the just-revealed Mini Superleggera Vision. But this year the Bavarian automaker has been somewhat tricky.
What would you first think when you heard of the BMW Concept Roadster? A lithe, two-seat convertible? Nope. This roadster is a cut-down, minimalist motorcycle with an ultra-modern design. As opposed to the retro looks of the Concept 90, this naked bike looks like it could fit in a BMW showroom tomorrow and not seem out of place.
The Concept Roadster packs the brand's classic two-cylinder boxer engine displacing 1,170 cubic centimeters and producing 123 horsepower and 92 pound-feet of torque. That power is routed to the rear wheel via a cardan drive, essentially a driveshaft, with a single-sided swing arm rear suspension. It's all nestled in a tubular spaceframe.

2013 Dinan S3 BMW 550i

Steve Dinan has been enhancing BMW models since 1979. But don't throw his company into the ring with the dozen or so other tuners who tweak, tinker and piggyback upgrades on the famed German marque. Dinan is a tuner, but it's also an engineering firm that writes its own software, builds its own parts and then backs everything it does with a factory-grade warranty. That sort of fastidiousness comes at a price, but most of its customers - including the powerhouse of BMW Motorsport - rely on Dinan to help them come out on top.
In stock form, BMW's 550i is a formidable four-door with a twin-turbocharged 4.4-liter V8 rated at 400 horsepower and 450 pound-feet of torque. While those figures allow it to run with quick company (0-60 in 5.0 seconds, according to the automaker), Dinan puts the sedan's kettle on full boil with its S3 package. Starting with the engine, the performance engineering firm bolts on larger turbochargers, air-to-water intercoolers, a trick strut tower brace cold air intake, a quad-pipe free flow exhaust and its own engine management software. Pump in some premium fuel, and the result is 542 horsepower and 587 pound-feet of torque. Power is sent through the stock eight-speed automatic to a limited slip rear differential (Dinan will upgrade xDrive all-wheel drive models, too).
The Dinan S3 also features and extensive suspension upgrade that includes new front camber arms and low compliance rear control arms (engineered to reduce understeer and improve turn-in). The stock dampers are retained, but new bump stops are installed along with new springs. Overall, the car rides about a half-inch lower than stock to improve roll rate. To reduce unsprung weight, forged 20-inch HRE Performance wheels are fitted at all four corners (wearing Michelin Pilot Super Sport tires - 275/35ZR20 up front and 295/35ZR20 in the rear). Lastly, the company remaps the factory Electronic Damper Control (EDC) software with its own Dinan Shockware to work in conjunction with the new enhancements.

Even 'Ring taxi drivers need to respect the Green Hell

The Nürburgring Nordschleife has the reputation as one of the most difficult tracks in the world to master - deservedly so. With 14 miles of roadway and about 160 corners over a massive amount of elevation change, the amount of grip can change from turn to turn. As the driver of the famous BMW Ring Taxi learned this weekend after a shunt into the barricades, the 'Ring can bite unsuspecting pros just as easily as amateurs.
The video of the incident below shows the M5 oversteering right into the wall as a phalanx of Porsche models arrive behind it. According to Bridge to Gantry, a website that specializes in news about the 'Ring, the taxi's passengers were picked up by another Ring Taxi and driven off with a fantastic story to tell their friends back home. "The accident happened at low speed, there were two passengers in the car, but no one had at any injuries," said BMW spokesperson Cypselus von Frankenberg to Autoblog via email.
The crash also closed track for over an hour to clean up and to haul the stricken BMW away. When a driver making a living from driving lap after lap at the Nordschleife has a crash even as seemingly minor as this one, it just goes to show why the course has the nickname 'The Green Hell.'