BMW M4 Convertible
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BMW adds a bunch of options for the 4 Series, including a drop-top convertible, four-door Gran Coupe and the big-power M4.

The 428i uses a 240-horsepower turbocharged four-cylinder engine; 435i puts you in control of a 300-horsepower turbocharged inline-six, which is boosted to 425 horses in new M4; six-speed manual or eight-speed-automatic-transmission option.

Fully invested in making its even-numbered models more exciting, BMW continues to spin more versions of its new-ish 4 Series line. All use much of the wider-and-longer 4 Series coupes as a basis, although the new Cabriolet obviously ditches the fixed roof in favor of a complex folding metal hardtop. The roof can be raised or lowered in about 20 seconds, although you must be nearly stopped before it operates. At the other end of the spectrum, the new 4 Series Gran Coupe four-door model mimics its larger 6 Series sibling, meaning an even lower roof and much longer body, which — somewhat bizarrely — uses a hatchback to access the cargo area, like the Audi A7. The new high-performance M4 (formerly the M3 coupe) gets more aggressive body bits that are expected of the M cars, including a carbon-fiber roof and huge fenders covering wide 19-inch-diameter wheels and performance tires. The front and rear get similarly striking bits that are all designed to send as much air through the engine bay as possible for cooling and intake. The M4 uses a 3.0-liter inline straight-six engine and with two turbochargers it produces 425 horsepower and 406 pound-feet of torque. It uses either a six-speed manual transmission or optional seven-speed paddle-shift manual to send power to the rear wheels. All models provide a more sporting experience for the driver along with a cooler personal-luxury look. The 4 Series models are easily among the most attractive of their type to be found anywhere, at any price. The bewildering part is that, despite their enlarged stature, they still look like the 3 Series models, especially from the front. They also come with the same powertrains that are also found in other Bimmers. The base 428i models come equipped with a 240-horsepower 2.0-liter turbocharged four-cylinder. The 435i uses a 300-horsepower six-cylinder engine, which makes for a 60-mph-sprint time of 5.3 seconds. Either engine is connected to a six-speed manual transmission, or optional eight-speed automatic. You can also equip each edition with BMW’s x-Drive all-wheel-drive setup plus a trio of option groupings — Luxury Line, Sport Line and M Sport — that add items such as distinctive wheels (a BMW specialty), leather interior and sport-style seats.