2001 Bmw 525i Base Sedan 4-door 2.5l on 2040-cars

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2014 BMW 320i

When BMW switched its entry level 3 Series, the 328i, from a naturally aspirated, 3.0-liter six-cylinder to a turbocharged, 2.0-liter four-cylinder, we weren't entirely sure what to think. Sure, from a pure numbers perspective, the new 2.0-liter cooked the old 3.0's goose, delivering more torque at far more accessible engine speeds while boosting horsepower and fuel economy.
While we miss that revvy six-pot, the numbers for the 2.0 were just way too good to pass up. Then we received news of an even less-powerful 2.0-liter 3 Series - the 320i. This was interesting, as it saw BMW delving into a power level previously owned solely by the anemic Lexus IS 250 and its six-cylinder engine.
Could BMW make a sub-200-horsepower sedan that still drove the way we expected a 3 Series to drive? To find out, we borrowed the new 320i for a week of testing.

AC Schnitzer's hotrod BMW 318ti remembered by MotorWeek

There are plenty of compact luxury cars available in the US today, including the Audi A3, BMW 2 Series, and Mercedes-Benz CLA-Class. In the '90s, the BMW 318ti tried to offer a similar mix of luxury at a reasonable price, but it never quite found much success in America. The 318ti looked like an E36-generation 3 Series in front but featured a stumpy liftback at the rear. The only engine available in the US was a four-cylinder. If you had the money, though, the aftermarket was ready to give you more power and more aggressive looks. AC Schnitzer dropped a bored and stroked 3.0-liter inline-six under the hood to create a pocket-sized hot rod, and MotorWeek took it for a drive. The model in this video was the promo car for AC Schnitzer's US importer, and it had every upgrade possible to show off what the German tuner's produced. Under the hood, the company installed an upgraded engine with 241 horsepower and 228 pound-feet of torque. For comparison, a US-spec M3 of the era had 240 horsepower and either 225 or 236 lb-ft, depending on the model year. AC Schnitzer also sharpened the 318ti with a suspension overhaul and short shifter. According to MotorWeek's tests, the mods got the hatchback to 60 miles per hour in 6 seconds and gave 318ti laudable handling. So much performance wasn't cheap, though. The upgrades on the promo car cost more than twice as much as the 318ti's base price. Watch this Retro Review to find out the massive amount you needed to pay to get M3 performance in a tiny package. Related Video:

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.