The short answer
Based on available data, the Acura NSX comes out ahead of the BMW i8 on power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Overall
Overwhelmingly positive sentiment approaching legendary reverence for first-generation model, widely regarded as revolutionary supercar redefining exotic car reliability, usability, and everyday drivability. Praised extensively for exceptional Honda build quality enabling routine 200,000-300,000+ mile operation without major mechanical failures, precise handling dynamics teaching Ferrari and Porsche lessons in chassis balance, comfortable ergonomics allowing daily driving unlike temperamental Italian competitors, and timeless aluminum body construction preventing rust. The naturally-aspirated 3.0L V6 producing 270-274 hp delivers linear, predictable power delivery with intoxicating VTEC engagement at 5,800 RPM and 8,000 RPM redline.
Best version to buy
3.0L Manual Transmission (1991-1997, pre-facelift) The 1991-1997 pre-facelift models with 5-speed manual transmission represent purest NSX expression - lightweight aluminum construction (approximately 3,000 lbs / 1,361 kg), naturally-aspirated 3.0L C30A V6 producing 270-274 hp, fixed headlights (1991-1993 pop-ups add 60 lbs / 27 kg), manual steering maintaining ultimate feedback. The 1995+ NSX-T targa variant adds removable roof panel but 100+ lbs (45+ kg) weight penalty and reduced chassis rigidity.
Known issues
Overall
Mixed sentiment with a clear divide between perception and ownership experience. The vehicle is widely criticized for a perceived mismatch between its dramatic, supercar-inspired styling and its actual performance capabilities, particularly when compared to contemporary BMW M cars like the F80 M3. This has led to a reputation in some circles as a "poser car" or a "lawnmower in a supercar body." However, a strong counter-narrative from long-term owners praises the i8 as a reliable, surprisingly fun-to-drive grand tourer with low maintenance costs and exceptional fuel efficiency for its appearance.
Best version to buy
Insufficient owner data available to declare a consensus "best" version. Owner discussions mention both the Coupe and Roadster (2018+) variants, with the Coupe noted for retaining small rear seats and slightly lower weight, while the Roadster sacrifices that practicality for an open-air experience.
Known issues
The verdict
The BMW i8 is the better choice for most buyers.
It has stronger reliability sentiment in owner reports than the Acura NSX, based on the data above. If the specific known issues on the BMW i8 are a dealbreaker, the Acura NSX is worth a closer look instead.
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Which is more reliable, the Acura NSX or the BMW i8?
Owner reports lean more positive on reliability for the BMW i8 than the Acura NSX. See the known issues comparison above for the specific concerns owners report on each.
Which is better for families, the Acura NSX or the BMW i8?
Both seat a similar number of passengers based on our data. The Acura NSX is classed as a Coupe, the BMW i8 as a Roadster, which affects cargo space and ride height for family use.
Which has better fuel economy, the Acura NSX or the BMW i8?
Fuel consumption data is limited for one or both models. Check the specs table above for the figures available on each catalogued version.
Which is cheaper to maintain, the Acura NSX or the BMW i8?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Acura NSX than the BMW i8. See the known issues comparison above.