The Pagani Zonda is a supercar made by Italian car maker Pagani. It debuted in 1999 and continues through the present, with production proceeding at roughly 25 cars per year. As of December, 2005, 60 Zondas had been built. It is a mid-engined 2-seat coupe and convertible. Construction is mainly of carbon fiber.

Some early Zonda engineering was done by Formula One champion, Juan Manuel Fangio. The car was originally to be named for him, the "Fangio F1", but the name was changed upon his death in 1995.

The Zonda is often compared to other supercars such as the Enzo Ferrari, the Koenigsegg CCR, the Lamborghini Murcielago and the Porsche Carrera GT.

The C12 debuted at the 1999 Geneva Motor Show. It was powered by a 6.0 L (5987 cc) Mercedes-Benz AMG V12 engine and could reach speeds of 185 mph (297 km/h). The engine produces 408 PS (300 kW/402 hp) at 5200 rpm and 421 ft·lbf (571 N·m) at 3800 rpm.

Just five of the original 6.0 L Zonda were built, though it was still available in 2002 when the C12 S debuted. One was used for crash testing, while another was a demonstrator and show car. The rest were delivered to customers over the next three years, priced at US$320,000.

The C12 could accelerate to 60 mph (97 km/h) in 4.2 seconds and hit 100 mph (161 km/h) in 8.2 seconds. Acceleration through the quarter mile was 12.1 seconds at 124 mph (200 km/h). Lateral acceleration on the skidpad was .93g, and the car could brake from 60 mph (97 km/h) in 110 ft (34 m).

The C12-S used a 7.0 L (7010 cc) version of the engine producing 550 PS (404 kW/543 hp). It can accelerate to 60 mph (97 km/h) in 3.7 s, to 100 mph in 9.5 s and complete the quarter mile in 11.9 s. Lateral acceleration on the skidpad is 0.98 g (9.6 m/s2). The car is 10 kg (22 lb) lighter than the normal Zonda C12. Top speed is 220 mph (354 km/h) for the coupe and 215 mph (346 km/h) for the roadster. The car's price tag was US$350,000.

The C12 S features an elongated nose and flaps at the rear for improved aerodynamics. New light clusters and exhausts are also used. Fifteen 7.0 L C12 S cars were produced.

The 7.3 L (7291 cc) C12-S 7.3 of 2002 used one of the largest V12 engines ever made. The engine was designed and manufactued by Mercedes-Benz AMG. Traction control was added to handle the 555 PS (408 kW/547 hp) and 750 N·m (553 ft·lbf) that this engine produces. As of 2005, only five coupes out of an expected 100 have been produced.

A roadster version is also built, with production limited by the company to 40 examples. As of 2005, nine roadsters had been built. According to Road & Track magazine, three more C12-S 7.3 cars had been built as of June, 2005, but it is unclear whether they were roadsters or coupes. Motor Trend reported that 60 Zondas of all types had been built in their January 2006 issue.

The Zonda C12 F debuted at the 2005 Geneva Motor Show. It is the most extensive reengineering of the Pagani car yet, though it shares much with its predecessors including the 7.3 L V12. Power is increased to 602 PS (443 kW/594 hp) with a special clubsport model producing 650 PS (478 kW/641 hp). The company promises a 3.5 second sprint to 60 mph (97 km/h, a top speed over 344 km/h (214 mph) and it will be the queen in braking from 300 km/h to 0 (186 mph to 0). The Zonda F clubsport has a power to weight ratio of 521 bhp/ton (384 W/kg) . Compare, for example, the Enzo Ferrari which has a power to weight ratio of 483 bhp/ton (356 W/kg) .

The Zonda F will be built in a new factory capable of producing 250 cars per year. 70 of these cars per year will be the first Paganis to officially be offered in the United States, though four prior Zondas were imported for racing. The company plans to complete full Federalization, including crash testing, before the introduction of the car in 2007.

The Zonda F, named after pilot Juan Manuel Fangio, comes with an extra head light and different fog lights at the sides, a new rear spoiler that improves the cars aerodynamics and different side mirrors. Further enhancements over the 'S' centre around optional carbon/ceramic brakes developed in conjuction with Brembo, magnesium wheels, inconel titanium exhaust system, hyrdoformed aluminium intake plenum and a redesigned 'Z preg' weave in the crash structure to improve rigidity and reduce weight. The Zonda F is the first car that Pagani will produce in large quantities compared to the other, older, Zondas.

The Zonda F currently holds the fastest track time on the popular show Top Gear at 1:18.4. The car was driven by The Stig, and beat the former record holders, The Maserati MC12 and The Ferrari Enzo Ferrari.

The Zonda Roadster F debuted at the 2006 Geneva show. It is similar to the coupe, but with a removable carbon fibre roof and canvas side curtains weighing just 11 lb (5 kg). Production of the Roadster F is suggested at 25 units.