Powertrain
The Regera has a reported total power output of 1822 PS through a hybrid powertrain. As in general, the Regera's internal combustion engine (ICE) generates its greatest power only at high rpm; however, due to the fixed gear, this corresponds to very high speeds. Power at low speeds is filled in by the electric motors, giving a maximum combined mechanical power output of 1,500 hp and 1475 lbft of torque.[12][20][21]
Internal combustion engine
The Internal Combustion Engine (ICE) is a mid-rear mounted, in-house developed, twin-turbocharged V8 engine with a 5.0-litre displacement. It has four valves per cylinder, each with a bore and stroke of 92 x and a compression ratio of 9.3:1. The engine utilizes dry sump lubrication and dual overhead camshafts, and has a cylinder bank angle of 90º.[22] It is rated at 820 kW at 7,800 rpm and 1280 Nm of torque at 4,100 rpm on 95 octane RON gasoline. A flex fuel sensor is installed in the fuel tank to detect E85 biofuel, which increases the power output to 1500 hp.[23] The ICE is rev-limited at 8,250 rpm.[24]
Electric motors
The ICE works in conjunction with three YASA electric motors with a total capacity of 520 kW and 900 Nm of torque.
Internal combustion engine
The Internal Combustion Engine (ICE) is a mid-rear mounted, in-house developed, twin-turbocharged V8 engine with a 5.0-litre displacement. It has four valves per cylinder, each with a bore and stroke of 92 x and a compression ratio of 9.3:1. The engine utilizes dry sump lubrication and dual overhead camshafts, and has a cylinder bank angle of 90º.[22] It is rated at 820 kW at 7,800 rpm and 1280 Nm of torque at 4,100 rpm on 95 octane RON gasoline. A flex fuel sensor is installed in the fuel tank to detect E85 biofuel, which increases the power output to 1500 hp.[23] The ICE is rev-limited at 8,250 rpm.[24]
Electric motors
The ICE works in conjunction with three YASA electric motors with a total capacity of 520 kW and 900 Nm of torque. One 215 hp YASA 400 Motor Generator Unit mounted on the crankshaft acts as starter and generator and supplies torque fill; and two 241 hp YASA 750 wheel-shaft mounted electric motors drive each rear wheel and provide torque vectoring and manages traction.[25] The electric motors are powered by a 4.5kWh, 800 volt, 75 kg liquid cooled battery pack developed by Rimac Automobili, making it the first 800-volt production car.[26][27] Koenigsegg claims that the battery pack is the most power-dense battery pack ever created for a production car.[11][12][21]
Transmission
Christian von Koenigsegg invented the Koenigsegg Direct-Drive System (KDD), and it was developed for the Regera by the Koenigsegg Advanced Engineering Team.[30] The KDD system effectively eliminates the need for a transmission and allows for pure EV (electric vehicle) mode. The Regera does not have a traditional multi-gear transmission but instead features a single-speed fixed-gear transmission, often called a direct-drive, with a 2.73:1 reduction ratio, meaning the crankshaft mounted on the ICE will rotate 2.73 times for every 1 time that the output shaft of the direct-drive mechanism will rotate.[31]
At speeds below 30. mph, the wheel shaft electric motors mostly propel the car through the use of a hydraulic coupling that lets the ICE and the crankshaft mounted electric motor slip. In reverse, only the wheel shaft electric motors propel the car.[11][32] Above 30mph, the RPM of the crankshaft mounted electric motor and internal combustion engine are proportional to wheel speed through locking of the hydraulic coupling.[11]
Suspension
The Regera features a similar suspension layout to the preceding Agera models, with double wishbone suspension at the front and rear axles.[35] The wishbones are manufactured from chrome-molybdenum steel tubes, which was chosen over carbon-fibre due to the significant cost and complexity of the latter option.[36] The suspension incorporates special Z-shaped anti-roll bars that connect to the body at only one point (as opposed to two for traditional U-shaped bars). Also returning from the Agera models is Koenigsegg's 'Triplex' damper system, which consists of three custom Öhlins shock absorbers on the rear suspension subsystem.[36] While anti-dive forces under heavy braking are achieved by obliquely mounting the top wishbones in the front of the car, this mounting position could not be achieved in the rear. Therefore, the purpose of the third 'Triplex' rear damper is to provide anti-squat forces under hard acceleration.
Wheels
The Regera has aluminium wheels or carbon fibre wheels (optional) with diameters of 19 in at the front and 20 in at the rear with center-lock wheel nuts. The tyres are Michelin Pilot Sport 4S' with codes of 275/35 ZR 19 (100Y) for the front and 345/30 ZR 20 (106Y) for the rear.[37] The car comes with track focused Michelin Pilot Sport Cup 2 tyres when equipped with the Ghost package. The brakes are ventilated carbon-ceramic discs, with a diameter of 397 mm and six-piston calipers at the front along with a diameter of 380 mm and four-piston calipers at the rear.[11]
Aerodynamics
Like its other production counterparts, the Regera is equipped with active aerodynamics for optimized downforce. At the rear is a foldable hydraulic wing, and at the front are active flaps that can modify the flow of air under the car. The manufacturer claims that the stock aerodynamic system is capable of generating 450 kg of downforce at 250 km/h.[12]
Before the 2018 Geneva Motor Show, Koenigsegg revealed the optional 'Ghost' package for the Regera. This package extends the front splitter and the side sills, adds canards to the front fenders, and adds fixed winglets to the rear quarter panels.[38] Koenigsegg claims that, with the Ghost package installed, the downforce of the Regera is "increased by more than 20 percent".[38]
Interior features
The Regera includes added insulation to help add to the luxury by reducing cabin noise caused by the wind and powertrain along with 8-way electrically adjustable memory foam seats included as an added luxury item over previous models. The Regera also includes many new technical features such as a Neonode 9-inch infrared infotainment system, a complete camera system with recording capabilities (front, inner, and rear), Apple CarPlay, a new sound system, ambient lighting, and 4G and Wi-Fi connectivity.[39] It also features front and rear parking sensors.[12][40]
The wireless connectivity capabilities of the Regera allow for Koenigsegg to send over-the-air firmware and software updates to each car as necessary.[41] This allows for the remote modification of parameters such as the power band of the electric motors or throttle response without the need for physical work on the car.[18]
Exterior features
The day-time running lamps on the Regera were designed to resemble a constellation, with the carbon-fibre background resembling the night sky. In addition, the headlamps can actively vent out condensation through two small fans installed in each lamp.[42] Koenigsegg claims that the Regera is the first "fully-robotized" car.[43] All openings and wing mirrors are fitted with proximity sensors to safeguard against the doors striking nearby objects (curb, low roof, etc.) while opening or closing.[44] The vehicle features hydraulic pumps and accumulators to control the active front and rear wings, as well as active chassis control and lifting. Hydraulic lifters were added to the already existing pumps and accumulators to allow for all body panels on the vehicle to be remotely operated.[12]
The Regera uses a fishtail-style dual exhaust system designed by Akrapovič constructed of titanium, Inconel, and stainless steel.[45]
Koenigsegg states it is capable of accelerating to 100 km/h from a stand still in 2.8 seconds, 200 km/h in 6.6 seconds, 300 km/h in 10.9 seconds and attaining a speed of 400 km/h in 20 seconds. Koenigsegg also claims that the acceleration from 150–250 km/h requires 3.9 seconds.[47]
The Regera has a power-to-weight ratio of undefined kW per kilogram, and the combined ICE and electric motors produce the highest combined peak power and torque output of any other production hybrid car.[48]
