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Alpina unveils B4 Bi-Turbo at Tokyo Motor Show

It didn't take long for German tuning house Alpina to debut its version of the new BMW 4-series, and they've chosen the Tokyo Motor Show to unveil the new model. Under the hood of the Alpina B4 Bi-Turbo is a 3.0-liter straight-six engine with two turbochargers, making 410 hp and 442 lb-ft of torque. Alpina has tweaked the suspension a bit as well, installing their adaptive-sport suspension and an eight-speed automatic transmission.

Lexus offers coupons for F-Sport accessories in July

Lexus is offering a 20 percent discount coupon for use on all F-Sport accessories in July that's worth up to $2,000. Lexus recently added the IS C and the GS to the accessory line, which includes forged alloy wheels, brake upgrades, a sway bar kit and other items. The discount is valid at Lexus dealerships, and it's limited to one per customer.

Hyundai, Kia retract mileage claims

Hyundai and Kia overstated the estimated fuel economy on more than 900,000 U.S. vehicles sold over the past two years and will compensate owners for the faulty claims, a newspaper reported. In addition, the South Korean partners will lower the fuel-economy estimates on most of their 2012 and 2013 models, the Detroit News said.