BMW M340i 2026 (B58 Gen3): CITY fuel consumption economy real test mpg l/100 km traffic jam 2026

Here you have the CITY fuel consumption (fuel economy real-life test) of 2025 & 2026 & 2027 BMW M340i xDrive G20 (392 PS) with B58 Gen3 3.0l turbo-petrol engine (inline-6 R6) in a city (urban area, town, also in heavy traffic). This car has 3.0l turbo petrol engine (straight-6) with small electric motor (MHEV system). Total system power 288 kW (392 HP), 540 Nm, xDrive (AWD/4WD), 8-speed Steptronic automatic gearbox. The total output was increased comparing to B58 Gen2 (   • BMW M340i xDrive 2023: CITY fuel consumpti...  ) from 374 to 392 PS. It is the newest 2026 version of BMW M340i with B58 Gen-3 engine, (almost) the same which will be used in BMW M350 (G50) 326 kW (443 HP PS). Of course, BMW M350 will be less efficient because of the higher weight and bigger wheels. 00:00 BMW M340i 2026 B58 gen3 specs I made two tests/runs: 00:15 1st city run in ECO PRO mode with Start-Stop system active: 7.5 l/100 km (31.4 mpg US / 37.7 mpg UK). Avg. speed of the test: ~21.2 km/h (~13.2 mph). 09:50 2nd city run in COMFORT mode and Start-Stop system deactivated: 8.8 l/100 km (26.7 mpg US / 32.1 mpg UK). Average speed of the test: ~21.7 km/h (~13.5 mph). Calculated range on one fuel tank (59 l) BMW M340i xDrive G20 392HP: est. range in a city (eco mode): 710-785 km | 445-490 mi Fuel consumption (economy) results for BMW M340i xDrive 2025 2026 392PS in other scenarios (highway included):    • B58 Gen3 6cyl (BMW M340i / M350): highway ...   Tyres: Hankook Ventus Evo 225/45 R18 95Y + 255/40 R18 99Y with "C/A" index of rolling resistance. As always, I checked real fuel consumption on a petrol station. I noticed -1%: computer shows HIGHER by 1% fuel consumption comparing to what I refueled on a petrol/gas station. Additionally: the reported distance was overstated by ~2.5%. -------------------------------------------- [PL] BMW M340i xDrive 2026 zasięg, spalanie i zużycie paliwa benzyny w BMW M340ixDrive z B58 gen-3 benzyną 3,0 392 KM i napędem xDrive, benzyny średnio w mieście. Realny test zasięgu i spalania w BMW M340i xDrive turbo z 3.0l silnikiem benzynowym, napędem na wszystkie cztery koła 4x4 i automatyczną skrzynią biegów Steptronic. Miasto, korki w mieście.