Peugeot's Prologue HYmotion4 concept is in many ways the opposite of the same company's RC HYmotion4 concept. The upright crossover style Prologue is a different animal from the sleek four-door coupe. Both vehicles use the same through the road hybrid architecture but flipped front/rear. The Prologue puts the internal combustion engine up front and runs on diesel instead of gasoline with the electric motor going at the back. The diesel puts out 163 hp while the motor is limited to 27 kW. With both the engine and motor running, 221 lb-ft of torque are available to the front wheels while the rears get 148 lb-ft. As with the other HYmotion4 concepts, the vehicle can be propelled by either the engine, motor or both. In rear wheel drive electric only mode, speeds are limited to about 30 mph by the 36 hp output and the use of a nickel metal hydride battery. Nonetheless, the Prologue generates some pretty impressive numbers. The French automaker claims a combined mileage of 52.3 mpg (U.S.) and CO2 emissions of just 109 g/km. One interesting performance enhancement that Peugeot mentions is the interaction between the transmission and motor. The 6-speed manual gearbox features automated shifting. The electronic controls automatically activates the electric motor during shifts to fill the gap in power flow smoothing out the process.