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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.

China’s Great Wall looking to partner with BMW to sell cars in the West

The Chinese automaker Great Wall seems to have moved on from courting Fiat Chrysler. According to Reuters, the company announced in a stock exchange filing that it's looking to collaborate with BMW's Mini brand in some way. Reuters also reports that BMW is open to discussion. We reached out to a BMW representative, and he provided us with an official statement regarding the news. The company didn't specifically say it is talking with Great Wall. What it did say is that it has had success with its current partnership with another Chinese automaker Brilliance, but also that the company is interested in expanding the Mini brand worldwide and in China. The statement says that Mini's future strategy and expansion will include "diversification of partnerships and new cooperation models." It also said that expanding in China "is only possible with a local partner." That sounds to us like BMW is pretty interested in working with Great Wall. This move comes about a month and a half after Great Wall attempted to purchase parts of Fiat Chrysler. The company was reported to be talking to FCA to purchase the Jeep brand, and it later confirmed that it was interested in that brand, a few, or the whole company. But things seemed to fall apart when Fiat Chrysler's CEO Sergio Marchionne announced it hadn't received any offers and wasn't working on any kind of deal with another company. Now it may seem a little odd that Great Wall would shift from trying to buy an SUV brand, or a company that is beginning to concentrate on crossovers and trucks, to one that specializes in compact cars. After all, they're fairly different segments. Our theory is that Great Wall isn't necessarily interested in the specific products, but more that it's looking for a gateway to Western car markets. It's not something new for the company. As far back as 2013, the company made it clear it was looking to start selling cars in America. It also started looking into a manufacturing facility in Mexico earlier this year, which would supposedly supply vehicles to both Mexico and the U.S. Now when Great Wall announced its American sales intentions, it was targeting a date of 2015. That obviously didn't happen, and it probably has something to do with the company's products. Most of the cars under the Great Wall and Haval brands bear an uncanny appearance to discontinued models from other companies that compete in the West.

2015 BMW M3 squares off against Alpina D3 in gas vs. diesel throwdown

There was a time when diesel meant one of two things: This vehicle's owner either wants to save some money at the pump or needs to haul massive loads. It definitely did not mean that the owner of said machine wanted to drive fast, but that perception has slowly but surely been changing over the last several years, with automakers from Volkswagen and Ford to Audi and BMW offering spiced-up versions of their high-compression, turbocharged diesels.
It's that last automaker we mentioned that's the subject of the video you'll see down below. One bright-blue BMW M3 was procured by the Brits at Autocar, and it was lined up against a deep-black Alpina D3 (which we sadly can't buy in the US) in a spate of tests, including acceleration, stopping, sound and lap times on a closed circuit. The results, which we won't spoil for you, were enlightening, and were followed up by personal impressions from the man behind the wheel.
We know you're curious. All it takes to find out which of these 3.0-liter, twin-turbo-powered 3 Series variants came out on top is to scroll down below and watch. You know what to do.