2018 BMW i8 Coupe (I12 LCI) Dimensions, Size & Specs

The 2018 BMW i8 Coupe (I12 LCI) has a curb weight of approximately 1535 kg (3385 lbs), with a maximum weight ranging between 1905 kg and 1920 kg (4200 to 4233 lbs). Curb weight refers to the car's weight including all standard equipment, fluids, and a full tank of fuel but without passengers or cargo. Maximum weight includes passengers, cargo, and any additional load. These weights influence the vehicle's performance, fuel efficiency, handling dynamics, and braking. The i8 maintains a lightweight construction through the use of carbon fiber-reinforced plastic and aluminum, which balances powertrain weight and enhances driving agility.

The BMW i8 Coupe (I12 LCI) offers a luggage capacity of 154 liters (approximately 5.4 cubic feet). This space is relatively modest compared to traditional grand tourers or SUVs but is typical for a high-performance hybrid sports coupe. The limited trunk space results from the car's aerodynamic design, low height, and engineering focus on lightweight construction and hybrid battery placement. While it's suitable for small bags or groceries, it’s not ideal for extensive luggage. This is comparable to segment rivals like the Acura NSX and Porsche 911, which also offer limited cargo capacities due to their sports car designs.

The BMW i8 Coupe (I12 LCI) has a ride height, or ground clearance, of 117 mm (4.6 inches). This low clearance is typical of sports cars that prioritize handling, aerodynamics, and a low center of gravity. While this enhances stability and cornering performance, it does require caution when driving over speed bumps, steep driveways, or rough terrain to avoid scraping the undercarriage or front splitter. This clearance strikes a balance, allowing spirited driving dynamics without severely compromising everyday usability on well-maintained roads.

The BMW i8 Coupe (I12 LCI) comes equipped with staggered tire sizes to optimize performance. The front tires measure 215/45 R20 and the rear tires 195/50 R20, mounted on rims sized 7.5J x 20 (front) and 7J x 20 (rear). These 20-inch wheels balance sporty handling, grip, and ride quality. The wider front tires provide improved traction while the overall tire and rim combination supports the hybrid powertrain's dynamic capabilities, cornering precision, and braking. Additionally, the large wheels contribute to the car’s aggressive styling and aerodynamic design.

Yes, the BMW i8 Coupe (I12 LCI) generally fits into a standard residential garage. Its length of 4689 mm (184.6 inches) and width of 1942 mm (76.5 inches) without mirrors are within typical garage dimensions, where width clearance is often about 2.4 to 2.7 meters wide (7.9 to 8.9 feet). The low height of approximately 1291-1293 mm (50.8-50.9 inches) poses no problem for vertical clearance. However, when mirrors are open, the width extends to 2218 mm (87.3 inches), so caution is necessary in narrow spaces. Overall, it's well suited for urban and home parking conditions.

The 2018 BMW i8 Coupe (I12 LCI) maintains very similar exterior dimensions compared to the pre-facelift i8 generation. Both versions have a length close to 4689 mm (184.6 inches), with minor tweaks primarily in styling and aerodynamic elements rather than size. Width and height remain almost identical, preserving the compact and low-slung sports coupe stance. Weight and internal components improved due to technological updates in the LCI (Life Cycle Impulse) version, but the physical footprint stayed consistent to retain the dynamic driving characteristics that define the i8.

The BMW i8 Coupe (I12 LCI) is competitively sized in comparison to similar hybrid or sporty coupes. At 4689 mm (184.6 inches) length and 1535 kg (3385 lbs) curb weight, it is slightly longer but notably lighter than the Acura NSX, which measures around 4471 mm (176 inches) long and weighs approximately 1725 kg (3804 lbs). Compared to the Porsche 911 (992 generation), which is around 4519 mm (177.9 inches) long and weighs roughly 1640 kg (3615 lbs), the i8 is longer but lighter, emphasizing technological innovation with its carbon fiber construction and hybrid drivetrain. The i8’s light curb weight benefits agility and efficiency, distinguishing it from its rivals.

The BMW i8 Coupe (I12 LCI) introduced several enhancements over earlier models, focusing on refined aesthetics and technology. Inside, the cabin received updated ambient lighting, new trim options, and enhanced connectivity features including updated iDrive infotainment system with higher resolution displays and improved smartphone integration. Material quality and finish were elevated for a more premium feel. On the technological front, improvements included more efficient battery management, enhanced driving modes, and refined driver assistance features such as adaptive cruise control and lane departure warnings, contributing to both driver engagement and safety.

The BMW i8 Coupe (I12 LCI) combines a turbocharged three-cylinder petrol engine with an electric motor to deliver a total system output of around 369 horsepower. This plug-in hybrid setup enables respectable fuel efficiency and reduced tailpipe emissions for a sports car. Official combined fuel consumption figures are approximately 2.1 to 2.5 liters per 100 kilometers (112 to 94 mpg US), depending on driving conditions. Its electric-only range allows emission-free urban driving, while the hybrid system optimizes power and efficiency dynamically. This makes the i8 a pioneering vehicle blending performance with environmental consciousness.