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).
Frequently asked
The headline numbers for the 2025 BMW 840i Convertible, answered straight from its sourced record.
- How fast is the 2025 BMW 840i Convertible 0–60 mph?
- The 2025 BMW 840i Convertible accelerates from 0 to 60 mph in 5.00 s. Source: BMW.
- How fast is the 2025 BMW 840i Convertible 0–100 km/h?
- The 2025 BMW 840i Convertible accelerates from 0 to 100 km/h in 5.20 s. Source: Wikipedia.
- What is the top speed of the 2025 BMW 840i Convertible?
- The 2025 BMW 840i Convertible has a top speed of 155 mph. Source: Wikipedia.
- How much power does the 2025 BMW 840i Convertible have?
- The 2025 BMW 840i Convertible produces 335 hp. Source: Wikipedia.
- How much does the 2025 BMW 840i Convertible cost?
- The 2025 BMW 840i Convertible has a base price of $101,400. Source: US EPA.
- How much does the 2025 BMW 840i Convertible weigh?
- The 2025 BMW 840i Convertible has a curb weight of 4387 lb. Source: Wikipedia.
Rivals & alternatives
Cars in the same class at a comparable price and performance — each figure sourced. Open a head-to-head to weigh the numbers side by side.
