2002 Bmw M5 Base Sedan 4-door 5.0l on 2040-cars

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BMW M4 vs. Lexus RC F in Head 2 Head sports coupe showdown

It's the showdown everyone's been looking forward to, the East versus West grudge match of the year. We're talking, of course, about the BMW M4 versus the Lexus RC F.
Although BMW uses a twin-turbo straight-six and the Lexus uses a free-breathing V8, the two are pretty closely matched on paper: a luxury coupe with over 400 horsepower channeled to the rear wheels.
The BMW has been doing these cars for longer, and the M4 boasts a higher power-to-weight ratio. But then the RC F has more power - and without forced induction to break up the rev range. So which is the better luxury muscle coupe? Watch the latest episode of Motor Trend Head 2 Head to find out.

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.

BMW-Toyota joint sports car project is on like Donkey Kong

It's official - there will be a jointly developed sports car from BMW and Toyota. While the two auto giants signed a Memorandum of Understanding that pledged to pursue "joint development of architecture and components for a future sports vehicle" back in June of 2012, in the interim, it has remained unclear how those plans had been progressing. BMW has finally officially confirmed that the German and Japanese manufacturers will be codeveloping a pair of sports cars in addition to pursuing other disciplines including fuel cell systems and lightweight technologies.
"We have agreed on a joint architecture for a sports car. What is important is that there will be two different vehicles that are authentic to the two brands," BMW Development Chief Herbert Diess told Germany's Frankfurter Allgemeine Zeitung, Reuters is reporting. This is a very, very big step for both brands, but now the speculation can officially begin as to what the products of this agreement will look like.
There's ample reason to believe that the BMW-Toyota tie up will result in a Supra successor based on comments made by the chief engineer of the GT86/FR-S program, Tatsuya Tada, back in August. Follow that with a rumor from earlier this month that Toyota could debut a Supra concept car at the upcoming Detroit Auto Show later this month, and we could be seeing the fruits of this partnership sooner rather than later.