2004 Bmw 645ci Base Convertible 2-door 4.4l on 2040-cars

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BMW M3 takes on Mercedes-AMG C63 S in track battle from Evo

Over the last few decades, BMW has firmly established an enviable reputation among automotive enthusiasts by making what many consider to be the very best sporty sedans and coupes in the world. Every few years, a new challenger appears from one of the German brand's long list of competitors, but the result always seems to be the same: Close, but no cigar. The latest challenger to BMW's on-track crown comes from Mercedes-AMG in the form of the C63 S sedan. The AMG has a lot more power, an excellent and balanced chassis and it looks beautiful. But is it good enough to outperform the latest BMW M3? We're not going to spoil it for you. Watch the latest Deadly Rivals video from Evo to find out which competitor comes out on top.

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.

BMW readying Spartanburg expansion for X7 production

Prior to the debut of the original X5 in 1999, the idea of a BMW crossover might have seemed like heresy. But here we are, fifteen years removed from the Frank Stephenson-penned design, and the Bavarian automaker has expanded its crossover lineup to include the X1, X3, X4 and X6, and it's showing no sign of slowing down.
We recently reported that BMW is planning on slotting an X2 in at the bottom of the range between the X1 and X3, but now it's being widely reported that it's got an even larger one to put in at the top of its utility line. That, of course, would be the X7, a long-rumored three-row model that would give BMW a large family hauler to challenge the Mercedes-Benz GL.
According to The Wall Street Journal, BMW is expanding its assembly plant in Spartanburg, South Carolina, to accommodate production of the X7 alongside the X3, X4 and X5 that it already builds there for local consumption.