The new SR1 concept is the latest in a series of concepts produced by Peugeot and its sister brand Citroen over the last several years with a partially electric drivetrain called Hybrid4. Unlike the power-split systems produced by Toyota, Ford and others or the newer modular systems from Mercedes, BMW and Volkswagen, this is a through-the-road hybrid.
A turbocharged 1.6-liter inline-four with 218 horsepower output drives the front wheels through a six-speed manual gearbox. At the rear axle, a 40-kilowatt electric motor spins the rear wheels for on-demand all-wheel-drive or low speed electric-only operation. No mention is made of the battery type, but since it's a concept and small we're guessing Peugeot has opted for lithium ion.
While the mini-SLR looks of the SR1 certainly look producible, it seems unlikely to see the light of day given that Peugeot is just now launching the RCZ into production.