The 2015 Koenigsegg One:1 is Koenigsegg's top-range model in the Koenigsegg Agera model line aimed at becoming the fastest car not only in speed, but also on the track. It is aptly named for its equal power-to-weight ratio (PS to kilogram).
The Koenigsegg One:1 features a tuned up 5.0 L (5,032 cc) twin-turbocharged V8 engine, with 1341 hp (1360 PS; 1000 kW) and 1010 ft·lb (1369 Nm) of torque. Since 1,360 PS equals 1 megawatt (MW), the One:1 is often called the first "megacar". The One:1 also noticeably revs higher than its lesser counterparts, including the Agera R and Agera.
Apparently targeting the highest top speed record, the One:1 can do 0-250 mph in 20 seconds and reach a top speed of 273 mph (440 km/h). It is also bent on destroying lap records on the track, having set records at tracks like Circuit de Spa-Francorchamps and Suzuka Circuit.
Koenigsegg has built just over 100 cars since it began production out of a converted fighter jet hangar in 2003. Each car is hand-built to exacting specifications and excruciating detail at Koenigsegg’s factory in Ängelholm, Sweden. The One:1, pronounced as a ratio (“one-to-one”), is the company’s most radical accomplishment thus far. The strange name is representative of the nearly inconceivable 1:1 power to weight ratio. That’s 1341 hp (when running on E85) in a vehicle that weighs just 1360 kg with all fluids and a half tank of fuel. The One:1 will see its driver from 0 to 250 mph in just 20 seconds and can theoretically reach a 273 mph top speed – take it for a spin and try hitting that mark yourself. This rocket ship with wheels intends to set a new lap record at the Nürburgring once management at the famous racing venue allows lap records to be set again. With each of the six $2.4 million hypercars already sold, getting a hand on the wheel of this ultra-exotic in Forza Motorsport 6 is the closest the rest of us may ever get.
The Koenigsegg One:1 is very fast and currently stands as the fastest road-legal car in the entire series (in terms of forwards-going speed). While not having the best acceleration, it certainly still has excellent acceleration. The One:1 has the ability to reach 200 mph (322 km/h) in less than 15 seconds, a feat that most cars cannot accomplish outside of upgrading and tuning. It also has among the highest top speeds of all cars in the series, with the ability to reach 269 mph (434 km/h). The One:1's handling and braking are very impressive, as it can corner well, even at high speeds, and also has better braking than most hypercars, needing only up to 266 ft (81 m) to brake to a stop from 100 mph (161 km/h). Conversely, the One:1 is also among one of the hardest cars to master in the series, as on full throttle, the One:1 suffers from a lot of wheelspin up to fourth gear, meaning the player will have to be a lot more careful than normal when exiting corners, especially with regards to managing the throttle.
The Koenigsegg One:1's main rivals in Forza Horizon 3 are the Ferrari FXX K and Ultima Evolution Coupe 1020. The One:1, on the other hand, remains the best-performing hypercar in the game and is the second fastest car in terms of top speed, behind the Hennessey Venom GT's 270 mph (435 km/h).
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