BMW 4 Series 2020–2024 car dimensions: 4768 mm long, 1852 mm wide and 1383 mm high. Unladen weight is 1,600 kg. Braked towing is 1,600 kg.
The cabin centres on a driver-focused layout with sports seats and a leather sports steering wheel as standard. A touchscreen Control Display up to 10.25 inches handles navigation and media, with wireless Apple CarPlay and Android Auto built in. Three-zone automatic climate control is standard. Driver aids include standard front collision warning with braking, lane departure warning with steering correction, cruise control with braking function, and front/rear parking sensors. Blind-spot warning and a reversing camera come only on higher trims or packages.
The boot holds 440 litres with the rear seats in place. A 40:20:40 split-folding rear backrest is available to extend the space for longer items, though the load lip is relatively high.
The 420i Coupé can tow 1600 kg braked or 750 kg unbraked. Payload is around 490 kg. An optional electrically folding tow hitch is available. M Sport suspension is offered on higher grades for firmer handling but no dedicated heavy-duty cooling or reinforced setup for work use appears in the specs.
The cabin has a driver-focused layout with clean surfaces and high-quality materials. Sports seats come as standard with good support. Three-zone automatic climate control is standard. Acoustic glass in the windscreen cuts noise. An optional tilting/sliding glass roof brings in more light. Electrically adjustable seats with memory, heated front seats, adjustable bolsters and ventilated seats are available on higher grades or as options.
Combined fuel consumption 5.3-5.8 l/100 km (NEDC-equivalent figures).
Service via Condition Based Service (CBS), typically up to 30,000 km or 24 months.
Euro NCAP 5-star rating (adult occupant 97%, child 83%, vulnerable road users 93%, safety assist 72%).
Standard safety includes front/side/head airbags, driver knee airbag, AEB with pedestrian detection, lane departure warning with steering assist, speed limit info and PDC front/rear.
The 420i uses a 2.0-litre four-cylinder petrol engine with eight-speed Steptronic transmission as standard. Official combined fuel use sits in the mid-5 l/100 km range on NEDC-equivalent figures, with Euro 6d emissions compliance.
Servicing follows BMW Condition Based Service. The onboard system sets intervals based on use, commonly reaching 30,000 km or two years for oil and inspection work when Longlife oil is used.
Crash protection is strong. The car shares the 3 Series structure and earned a full five stars from Euro NCAP. Standard kit covers multiple airbags, automatic emergency braking that works well in city tests, lane keeping support and speed assistance.
Day-to-day running is straightforward with the CBS display showing remaining service life. Tyre pressure monitoring and run-flat capability (on many wheels) help keep downtime low. Regular checks of brake fluid every two years maintain the safety systems.
Length 4768 mm, Width 1852 mm, Height 1383 mm, Wheelbase 2851 mm (4 Series 2020–2024)
Sources: manufacturer data, BMW Media Information, Technical specifications, The new BMW 4 Series Coupé, 420i, valid from 06/2020, ACEA markets, weight homologation in part only, 59 l, DIN/EU unladen weight 1525/1600 kg, 2 doors and 4 seats, luggage.