Michigan Wheel Pj 81, 012050 on 2040-parts.com

Mercedes plans electric version of SLS AMG supercar

Huge news at Mercedes-Benz: Engineers from its AMG performance-car offshoot are developing a plug-in electric version of the upcoming SLS supercar as part of a broad-based efficiency program to place the automaker at the leading edge of socially acceptable performance-car motoring. Tentatively planned for production in 2015, the new zero-emission supercar draws heavily on the production version of the yet-to-be-fully-revealed SLS scheduled to get its first public outing at the Frankfurt motor show on Sept. 15.

BMW 4-Series: Alpina B4 Biturbo price and specs – debuts at Goodwood

The Alpina B4 BiTurbo (pictured) debuts at Goodwood 2014 We’ve already had the arrival of the BMW 4-Series Coupe and Convertible – the replacement for the old 3-Series Coupe and Convertible – so logically the next step is an Alpina version. And here it is. The Alpina B4 Biturbo is based on the latest 4-Series and gets the N55 BMW straight six from the 435i but tweaked and fettled by Alpina to deliver 404bhp and 442lb/ft of torque.

Doomed Saturns, Hummers make assembly-line curtain calls

Two doomed General Motors brands--Saturn and Hummer--are getting their last hurrahs on the assembly line. GM assembled 1,037 Saturn Outlooks last month after not making any Saturns since October. “We are building out a few Saturns to utilize existing material,” GM spokeswoman Kim Carpenter said.