2008 Bmw 550 I on 2040-cars

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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 1 Series sedan prepares to fight Mercedes CLA, Audi A3

The entry-level premium sedan segment is pretty hot right now, with the Audi A3 and Mercedes-Benz CLA-Class doing well for their respective automakers here in the US. Of course, BMW has its 2 Series, but that's currently only available as a coupe, with a convertible bodystyle forthcoming. That all looks to change, however, as our spies recently caught BMW testing a four-door 1 Series sedan that seems to have the A3 and CLA clear in its sight.
BMW's entry-level four-door is expected to ride on the same front-wheel-drive UKL platform that we recently spied in Mini Countryman form. We're pretty sure this thing will launch under the 1 Series line (odds for sedans and wagons, evens for coupes and convertibles), but it's anyone's guess with BMW - after all, the five-door, front-drive Active Tourer wears a 2 Series nameplate.
Look for the 1 Series sedan to launch sometime in 2016 as a 2017 model. Better late than never in the entry-lux segment, we suppose.

2014 BMW Z4 offers minor refinements with a majorly orange wrapper

The redesigned BMW Z4 was rolled out onto the show floor at the Detroit Auto Show, with the example in question being an sDrive35is variant, with the just-less-than-screaming Hyper Orange Package. The exclusive colorway includes the metallic orange paintjob, as well as trim-specific seats, stitching and accents for the interior. More importantly, the 35is driveline means that you'll find a high-output version of the turbocharged 3.0-liter N54 engine, here outputting 335 horsepower and 332 pound-feet of torque, and a 7-speed DCT gearbox.
Two slightly less ferociously powered versions of the Z4 will be available for the new model year, too (both familiar). The Z4 sDrive35i is good for 300 hp and 300 lb-ft, while the still-potent sDrive28i features a 2.0-liter turbo four-cylinder making 240 hp and 260 lb-ft.
You'll fine some more details about the 2014 BMW Z4 in our original news story about the model here, or by scrolling down to read the full BMW press release.