1997 Bmw Z3 Roadster Convertible 2-door 1.9l 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 M4 sheds some camouflage for latest test run

Last time we saw the upcoming BMW M4 out testing, it was heavily clad with camouflage and decidedly homely looking (as most early development mules are). But in this latest set of photos, the M3 coupe successor has started to come into its own skin, and we're seeing a shape more closely akin to that of a rendering we brought you a few months back.
Unsurprisingly, the M4 coupe looks very similar to the 4 Series Concept that BMW debuted at the Detroit Auto Show earlier this year. And while non-M version of the 4er will likely look a bit more sedate, these spy shots clearly show an aggressive front fascia, large wheels and the usual quad-exhaust rounding out the rear end.
Naturally, the M3 sedan will launch before this M4 coupe (and convertible), and powertrain details are still unclear as of this writing. We understand that the current M3's naturally aspirated V8 will be axed in favor of some sort of turbocharged six-cylinder engine, and we've heard plenty of rumors as to what, exactly, it might be, but we have yet to hear any official confirmation.

BMW looking to save billions with cost cuts

BMW is planning a fairly extensive overhaul in a bid to recoup some its annual costs, with CEO Norbert Reithofer (pictured above) aiming to save three to four billion euro ($4 to $5.4 billion) per year to help keep the company's profit margins between eight and 10 percent, while also maintaining investments in production expansion and new tech. BMW's profit margins sat at 9.4 percent in 2013.
According to Automotive News Europe, Reithofer is none too pleased about costs at Mini and on the 1 Series, although neither AN nor its source story, from Germany's Manager Magazin, elaborate on what steps could be taken to improve losses on either project. That makes it hard to figure out just where the fat will be trimmed from.
What may happen, though, is that BMW attempts to trim 100 million euros ($135 million) from its German labor costs each year; a solution hinted at a few weeks ago by Germany newspaper Muenchner Merkur. While a dramatic cost reduction, 100 million euros still doesn't begin to even approach the savings envisioned by Reithofer.