A motor vehicle has an internal combustion engine mounted in a central tunnel of the vehicle floor pan. The internal combustion engine comprises an engine block assembly having a lower end closed by an oil pan and an upper end extending at an angle α from a rear of the engine block assembly to a front thereof. An engine block closes the upper end and defines a crankcase that is configured to house a crankshaft for rotation therein. A cylinder housing assembly is reclined from vertical, towards the rear of the engine block, about an axis of the crankshaft by an angle β. At least a portion of the cylinder housing assembly and the crankcase are disposed in the central tunnel of the vehicle floor pan.