flat-plane-crank M178 LS2. The version sitting midships in and powering the rear wheels of the production Valhalla has been opened up by Aston Martin in order to increase its output to 817bhp (up ...
M178 LS2 is what AMG calls the flat-plane motor ... The LS2 also powers the Aston Martin Valhalla to the tune of 816 mechanical horses. The PHEV side of the powertrain adds 248 ponies to the ...