BMW 3 Series. While base models used a 4-cylinder engine, the range-topping Quadrifoglio — which means "four-leaf clover" in Italian — gained a twin-turbocharged V6 and a long list of chassis upgrades in a bid to dethrone the M3. Power comes from a 2.9-liter twin-turbocharged V6, rated at 505 horsepower and 443 lb-ft of torque. Output is sent to the rear wheels via an 8-speed automatic transmission.