The 840i Convertible (body code G14) is the rear-wheel-drive, six-cylinder cabriolet of BMW's second-generation 8 Series, a large CLAR-platform grand tourer positioned beneath the V8 M850i and the M8. Its turbocharged 3.0-liter B58 inline-six drives the rear wheels through a ZF eight-speed Steptronic automatic; in the 2024 facelift form sold for 2025 it makes 250 kW (340 PS / 335 hp) and 500 N·m (369 lb-ft), good for a factory 0-100 km/h time of 5.2 seconds and an electronically limited 155 mph. The fabric folding roof and additional bracing make the convertible the heaviest non-M 8 Series body style at roughly 1,990 kg. BMW withdrew the 8 Series after the 2025 model year, making this one of the final years of the open four-seat grand tourer.
Specifications by source
Each figure carries an evidence mark and a text label; expand a value for its full provenance — citation, verification, test conditions, and any alternate figures.
0–100 km/h5.20 sIndependent testWikipediaShow full source detail and alternate values
Originally reported as 5.2 s; stored canonically.
BMW factory claim for the 2024 facelift 840i RWD Convertible (5.3 s pre-facelift; the xDrive Convertible is 4.9 s). Read on the German Wikipedia G15 body-style-specific acceleration table (Cabriolet row).