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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.

Mini might build a sedan because it's running out of shapes

Rumors suggest we could soon see a Mini with a trunk to haul your junk. Autocar cites unnamed insiders who claim the sedan is part of the brand's plan for upmarket growth. There's even a possibility the new model could use the Riley moniker in reference to the Elf (pictured above) from the 1960s, which was a Mini with a tiny trunk. The Mini sedan would use BMW's front-wheel-drive platform that underpins the X1 and Clubman and might share the wheelbase and frontend styling with the Clubman as well, according to Autocar. Mini's execs think the four-door would perform especially well in North America and China, where there's less demand for hatchbacks. Ralph Mahler, vice president of Mini's product management, hinted at the possibility of the four-door to Autocar. "For example, in Asia and the US, the sedan segment is very big. This is very interesting to us, of course," he said. Mahler admits that many people don't know about the Mini-based vehicles with trunks from the '60s, like the Riley Elf, so it would be hard to market the new model on that heritage. This could be the perfect time to add a Mini sedan to the lineup, and it might not be a completely new idea for the brand under its BMW stewardship; a rumor from 2012 shows that Mini's bosses considered a four-door at least once before. The company launched new versions of its Hardtop, Convertible, and Clubman, and even added four-door and all-wheel-drive versions of the Hardtop to further blur the lines between that car, the Clubman, and the Countryman. The next-generation Countryman crossover should debut later this year, and the brand reportedly cancelled the Superleggera Vision roadster and Rocketman compact, as Mini has chosen to go big with its new models and its lineup breadth. There are only so many versions of a hatchback a company can make, and the short-lived Mini Coupe wasn't exactly a huge success. If Mini is going to try a new body style, a sedan actually makes some sense, even if we'll probably prefer the look and practicality of the hatches. Related Video:

2014 BMW 328i xDrive Gran Turismo

"The Ultimate Driving Machine" has been BMW's tagline for nearly 40 years. Launched in the 1970s, the marketing campaign was a stroke of genius by ad firm Ammirati & Puris, as the phrase helped differentiate the imported Bavarian cars from their fellow European rivals by subtly pointing out that Mercedes-Benz and Audi were offering luxury models, while BMW was selling sporty and youthful driving dynamics. The campaign worked - some would argue that stands among the most effective ad campaigns ever - and countless Baby Boomers embraced the brand's fun-to-drive image by taking delivery of the company's new models.
BMW still boasts that its vehicles are "The Ultimate Driving Machine" four decades later, but the brand is very different today. It offered just a few model lines in the mid-1970s, and only a handful of vehicles within. In 2014, the automaker offers an exhaustive range comprised of nearly a dozen lines with almost 50 different models. To survive and thrive, BMW has decided it must massively broaden its appeal.
One of the latest arrivals to BMW's ever-growing stable is the 2014 3 Series Gran Turismo. The five-door hatchback is best thought of as a smaller version of the company's 5 Series Gran Turismo built on stretched 3 Series platform that, in the case of this test car, shares the running gear of the 328i xDrive sedan. On paper, the five-passenger vehicle checks all the proper boxes with regards to performance, utility and economy. But does this family-focused 3 Series still deliver driving dynamics that qualify it for the title of Ultimate Driving Machine?