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BMW reveals M4 safety car with innovating water injection system [w/video]

Racing series don't just pick their safety cars at random, or use just whatever car is lying around. These days the car that sets the pace at the front of the pack is typically provided through consideration by a sponsor. In the MotoGP series, that's BMW and its M division, which have served up the Official Car of MotoGP since 1999. What you're looking at is the latest, and it packs some innovative technology on board. Aside from the matte black wrap with BMW's iconic striped livery, upgraded aero kit, retrofitted interior and emergency equipment, this BMW M4 coupe packs a new injection system under the hood. Only instead of injecting fuel, it injects water into the combustion chamber – something that wouldn't usually be recommended, but BMW insists actually aids in the combustion process. The idea is that the temperature of the air being mixed with the fuel inside the engine is usually hotter than ideal, so the system injects a fine mist of water into the collector in order to reduce the air's temperature... sort of like one of those hydrating misters at an amusement park or outdoor mall, but in an even hotter environment. The system brings the temperature of the air down to a more optimal temperature, helping it combust better. The process is said to yield a number of positive effects. For one, it reduces knocking. For another, it can make more out of lower-octane fuel where higher octane isn't available. It also can control the adverse effects of higher ambient temperature on the combustion process. But most of all, it increases output and reduce fuel consumption by around eight percent. Whether that eight percent is worth the added weight of the system – particularly with water pump and a 1.3-gallon tank in the trunk – is up for debate. But we'd imagine that the Bavarian engineers have weighed very carefully. Of course there's also the matter of refilling the water tank, which BMW says would be carried out whenever the safety car is refueled, but in real-world conditions would only necessitate attention once every five top-ups at the gas station. By now you might have guessed that BMW probably didn't develop this system just for the MotoGP safety car, and isn't planning on keeping it confined to the racetrack. Instead it's being tested and demonstrated on the safety car before being rolled out on production models in the future.

2019 Volvo V60 vs. wagon competitors: How they compare on paper

The next-gen Volvo V60 was finally revealed this week. The outgoing model has been on sale since 2011, getting a few minor updates along the way. The new model is based off Volvo's Scalable Platform Architecture that underpins other models like the XC90 and XC60 crossovers and V90 wagon. The V60 will launch with two engines, with a powerful hybrid coming sometime down the line. Since the last V60 hit the market, Audi, Buick and BMW have all released their own flavor of wagon. Like Volvo, BMW sells a traditional sedan-based model. Audi and Buick's wagons are both high-riding models with some very slight off-road pretense, much like Volvo's Cross Country models. We don't have details on the upcoming V60 Cross Country, but, even when accounting for ground clearance, the V60, BMW 3 Series Sport Wagon, A4 Allroad and Buick Regal TourX have a lot of overlap. Check out the specs breakdown below. Discover and compare other wagons and crossovers with our Car Finder and Compare tools. Engines, transmissions and drivetrains Out of the four wagons, the new V60 is the only one that offers two-wheel drive and a hybrid variant. The base V60 T5 uses a 250-horsepower turbocharged 2.0-liter inline four and sends power to the front wheels. Stepping up to the V60 T6 nets buyers an additional 66 horsepower thanks to a twincharged — supercharged and turbocharged — 2.0-liter and all-wheel drive. A T8 model that uses a 390-horsepower plug-in hybrid powertrain will be available soon. All V60s use an eight-speed automatic. The Audi, BMW and Buick are all powered by 2.0-liter turbocharged inline-fours. Additionally, the 3 Series has a 2.0-liter turbo diesel. All three wagons have standard all-wheel drive. The BMW and Buick use an eight-speed automatic, while the Audi sends power through a seven-speed dual-clutch transmission. As base engines go, there's a four-horsepower difference between the most and least powerful models, though the Buick wins out on torque. The V60 T6 matches the Regal TourX's torque figure and trounces every competitor's horsepower rating. The V60 T8 packs more power and torque than any of the competition. Cargo and interior space The outgoing V60 was on the small side for a wagon. This new model rectifies that a bit, though its 48.2 cubic-feet of cargo space with the second-row folded is still substantially smaller than the competition.

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.