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).
0–60 mphi5.00 sManufacturer claimBMWShow full source detail and alternate values
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.
