on all four corners, and anti-roll bars front and rear. The steering was rack and pinion with variable power assist. The vented disc brakes were at the front and at the rear. Magnesium alloy was used for the 18-inch wheels. Electronic driver aid systems included anti-slip regulation, which could be adjusted on two levels or switched off completely, and four-way anti-lock braking system. Engine The F133 A engine is a naturally aspirated 65° V12 with four valves per cylinder, dual overhead cams and a variable length intake manifold. It displaces and produces at 7,000 rpm and at 5,000 rpm. Bore and stroke measure 88 mm and 75 mm. The Barchetta's engine is very similar and has the same output but carries the F133 C engine code. Performance According to Ferrari, the 550 Maranello has a top speed of , and can accelerate from a standstill to in 4.4 seconds. Testing the 550 Maranello in 2000, American car magazine Motor Trend recorded a acceleration time of 4.2 seconds, a time of 9.6 seconds, and a ¼ mile (0.4 km) time of 12.5 seconds at 116.9 mph. 550 Maranello World Speed Record (WSR) In October 1998, Ferrari sent a lightly modified 550 to a 12 kilometers oval test track to the Transportation Research Center in East Liberty, Ohio and set three new world records as follows: A distance of 100 miles covered at an average speed of . A distance of 100 kilometers at an average speed of . Driving for one hour at an average speed of . To celebrate these records, Ferrari built 33 road cars to the exact specification of the record-setting car. They differed from the standard 550M by being fitted with the Fiorano handling pack, leather-trimmed roll cage, suede-covered steering wheel and carbon bucket seats with Daytona stitching and race harnesses. A 'WSR' plaque was on the center console and carbon fiber detailing was found on the gear knob and footrests. Aside from the actual record setting car, all cars were finished to European specifications. Besides the WSR plaque, all of the extra hardware could be ordered on a regular 550, including the handling package and the roll cage. A preproduction Lamborghini Murciélago broke these records in 2002 at the Nardò Ring in Italy. 550 Barchetta Pininfarina Ferrari introduced a roadster version of the 550 at the Paris Motor Show in 2000 to commemorate the 70th anniversary