2018 BMW i8 Roadster – BMW has introduced a convertible variant i8 body while the i8 Coupe renewed (more information i8 Coupe 2018 and testing i8 Coupe 2014 ). The top is canvas, with electrical opening and closing. Unlike the model of closed roof, the Roadster has only two seats. The propulsion system is hybrid, four – wheel moves and gives 374 hp total power. The battery can be recharged by using household electric current.
The roof mechanism can keep upright. Both the opening and closing are carried out in 15 seconds and both operations can be done with the car in motion up to 50 km / h. When descapota rear window rises 30 mm to act as a windbreak. The gap left between the seats and the back screen has a capacity of 100 liters, and serves as an additional relief to the front trunk, which is very small (88 l).
Doors open up, as in the coupe, but do without frames on the windows. They are made of aluminum and plastic reinforced with carbon fiber, like the rest of the car body (also carbon fiber thresholds of doors and some reinforced areas in both axes). BMW said weighing 60 kg more than the coupe, which is a small difference between these two body variants (convertibles usually always heavier because they require reinforcements in the structure. Between BMW 640i Coupe and 640i Convertible are 135 kg kg difference).
2018 BMW i8 Roadster Battery
The battery capacity is 11.6 kWh gross (9.4 kWh of net capacity), 4.5 kWh more battery model 2014 (hereinafter, the figures in parentheses are a comparison with i8 coupe 2014).
The electric motor has 143 hp (formerly 131) and transmits power to the front axle. According to BMW, the i8 Roadster may circulate only with electric propulsion up to 105 km / h in the standard mode (which is activated to start the car) and 120 km / h if the button is pressed to power the electric mode eDrive (before , in standard mode, only it reaches to 70 km / h, and the power to them 120 km / h). According to the NEDC test cycle, the i8 Roadster can travel up to 53 km only with electric impulse before completely draining the battery.
The battery requires “less than four hours and a half” for a full recharge in a power of 2.3 kW (230 V plug and 10 A, the usual home) and almost 3 hours for a full recharge in a outlet 3.6kW (V a 230 and 16 A).
The internal combustion engine drives the rear wheels. Receives a new filter in the exhaust to reduce the emission of particles and to improve its sound adjustments (relative to Coupe 2014). It has three cylinder 1.5 liter engine 231 gives maximum horsepower and 320 Nm of torque. It starts when much acceleration is required when certain speed is exceeded (which usually is less than the maximum speed in electric mode) or when no charge in the battery. It is also quick disconnects when the driver lifts off the throttle or the car needs little power to advance.
2018 BMW i8 Roadster Speed
The i8 Roadster can accelerate from 0 to 100 km / h in 4.6 seconds (two more than the Coupe 2018/10) and reach 250 km / h. The average consumption is 2.1 l / 100 km. There is no size convertible with similar power consumption as low (although this is very difficult to achieve in actual use).
The driver can choose between two driving modes. A hybrid in which both engines work together according to the needs and another purely electric. When the hybrid mode is active and there is a path set in the browser, the management system optimizes the operation to turn off the gasoline engine as long as possible (for example, when crossing areas at low speed).
The standard suspension dampers have varying hardness, and tires are 20 inch in diameter (the same size having the i8 Coupe 2014 but about lighter kilogram).
There are several combinations of colors of leather upholstery available as well as decorative moldings, to customize the interior, some of them different from the ones in the Coupé (standard series combination is called Carpo, with black and white leather. There two and Accaro called Halo).
In the standard equipment electrically adjustable seats and heating, peripheral vision system for parking assistance and navigation system Professional are included. The arrangement of menus multimedia system switches to that of the previous model. Among the optional elements are system information projected on the windshield, headlights laser technology and audible warning to pedestrians. None of these elements is novel in the range i8. Yes novel are two new exterior colors: E-Copper Gray metallic and metallic shades Donington.