Cummins: the largest independent diesel engine manufacturer. The QSK78: the largest engine they make. Mini: one of the smallest cars on the road. Oh dear, this could get messy.

The unfathomably large QSK78 was recently unveiled with 78 liters of displacement, eighteen cylinders (that's 4.3 liters per cylinder!), a dozen turbochargers, 3,500 horsepower and over 10,000 lb-ft of torque. It's used to power those enormous dump trucks seen schlepping heavy loads (try 360 metric tons on for size) around quarries and mines. And now it's been installed in a vintage Austin Mini.

The Frankenstein-ain't-got-nothin'-on-me monstrosity was, according to Cummins, commissioned by a customer, but we can hardly image it being actually drivable, let alone certified for street use anywhere this side of the Persian Gulf. It'll be unveiled this week at the Goodwood Festival of Speed, where it's sure to be the most powerful – not to mention the strangest – vehicle on display. Press release after the jump.