The i8 has standard City Collision Mitigation, which use forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The NSX doesn't offer collision warning or crash mitigation brakes.
The i8 has a standard Surround View to allow the driver to see objects all around the vehicle on a screen. The NSX only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.
Both the i8 and the NSX have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, daytime running lights and rearview cameras.
The i8’s corrosion warranty is 7 years longer than the NSX’s (12 vs. 5 years).
BMW pays for scheduled maintenance on the i8 for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Acura doesn’t pay scheduled maintenance for the NSX.
There are over 27 percent more BMW dealers than there are Acura dealers, which makes it easier should you ever need service under the i8’s warranty.
J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Acura vehicles. J.D. Power ranks BMW 11th in initial quality, above the industry average. With 12 more problems per 100 vehicles, Acura is ranked 20th, below the industry average.
J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Acura vehicles. J.D. Power ranks BMW 8th in reliability, above the industry average. With 32 more problems per 100 vehicles, Acura is ranked 20th.
From surveys of all its subscribers, Consumer Reports’ April 2018 Auto Issue reports that BMW vehicles are more reliable than Acura vehicles. Consumer Reports ranks BMW 14 places higher in reliability than Acura.
On the EPA test cycle the i8 running on electricity gets better fuel mileage than the NSX (68 city/70 hwy MPGe vs. 21 city/22 hwy).
On the EPA test cycle the i8 running its gasoline engine gets better fuel mileage than the NSX (26 city/29 hwy vs. 21 city/22 hwy).
The i8 can drive on battery power alone for up to 18 miles. The NSX must run its internal combustion engine to move.
For better ride, handling and brake cooling the i8 has standard 20-inch wheels. Only 19-inch front wheels are available on the NSX.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the i8 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The NSX doesn’t offer run-flat tires.
For a smoother ride and more stable handling, the i8’s wheelbase is 6.7 inches longer than on the NSX (110.2 inches vs. 103.5 inches).
For better handling and stability, the track (width between the wheels) on the i8 is 4.1 inches wider in the rear than on the NSX.
The i8’s front to rear weight distribution is more even (48.8% to 51.2%) than the NSX’s (42% to 58%). This gives the i8 more stable handling and braking.
The BMW i8 may be more efficient, handle and accelerate better because it weighs about 150 to 300 pounds less than the Acura NSX.
As tested by Car and Driver while cruising at 70 MPH, the interior of the i8 Coupe is quieter than the NSX (68 vs. 74 dB).
The i8 Coupe has standard seating for 4 passengers; the NSX can only carry 2.
The i8 Coupe has 37 cubic feet more passenger volume than the NSX (81 vs. 44).
The i8 Coupe has .4 inches more front headroom and .3 inches more front legroom than the NSX.
The i8 Coupe has a larger trunk than the NSX (4.7 vs. 4.4 cubic feet).
The i8 has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The NSX doesn’t offer a remote starting system.
The i8 has a standard heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The NSX doesn’t offer a heads-up display.
The i8’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The NSX’s manually variable intermittent wipers have to be constantly adjusted.
While driving with high beams on, sensitive light sensors standard on the i8 detect other vehicles which could be blinded and automatically switch to low beams. The NSX doesn’t offer automatic dimming high beams.
To help drivers avoid possible obstacles, the i8 has standard cornering lights to illuminate around corners when the turn signals are activated. The NSX doesn’t offer cornering lights. The i8 also has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.
The i8’s sun-visors swivel front-to-side to block glare from the side windows. The NSX’s visors are fixed into the windshield header.
The i8 has standard automatic dimming rear and side view mirrors which automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The NSX has an automatic rear view mirror, but its side mirrors don’t dim.