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Used BMW 420 for sale

The BMW 420 is the most popular engine option for the BMW 4 Series. It features a 2.0-litre petrol or diesel engine to offer a compelling mix of performance and efficiency in a sporty, coupé-like body style.

Image of a BMW 420 car

Used BMW 420 cars in stock

  • BMW 420 420d+XDRIVE+M SPORT+HUGE SPEC+LIKE BRAND NEW
    £26,995
    BMW 4 SERIES 420d+XDRIVE+M SPORT+HUGE SPEC+LIKE BRAND NEW
    • 2021
    • •
    • 12,280 miles
    • •
    • Diesel
    • •
    • Automatic
    London Carz Limited

    Icon - location pin London

  • AA finance available

    BMW 420 2.0 420i GPF M Sport Euro 6 (s/s) 5dr
    £14,980
    BMW 4 Series Gran Coupe 2.0 420i GPF M Sport Euro 6 (s/s) 5dr
    • 2019
    • •
    • 44,000 miles
    • •
    • Petrol
    • •
    • Manual
    Motoring City LTD

    Icon - location pin London

  • BMW 420 2.0 420i M Sport Auto Euro 6 (s/s) 5dr
    £27,150
    BMW 4 Series Gran Coupe 2.0 420i M Sport Auto Euro 6 (s/s) 5dr
    • 2022
    • •
    • 21,920 miles
    • •
    • Petrol
    • •
    • Automatic
    Car Planet Barnet

    Icon - location pin London

  • BMW 420 2.0 420d M Sport xDrive Euro 6 (s/s) 2dr
    £10,600
    BMW 4 Series 2.0 420d M Sport xDrive Euro 6 (s/s) 2dr
    • 2014
    • •
    • 64,269 miles
    • •
    • Diesel
    • •
    • Manual
    Car Planet Barnet

    Icon - location pin London

  • BMW 420 2.0 420i M Sport Auto Euro 6 (s/s) 2dr
    £9,900
    BMW 4 Series 2.0 420i M Sport Auto Euro 6 (s/s) 2dr
    • 2013
    • •
    • 72,018 miles
    • •
    • Petrol
    • •
    • Automatic
    Car Planet Barnet

    Icon - location pin London

  • BMW 420 2.0 420i M Sport Auto xDrive Euro 6 (s/s) 5dr
    £13,000
    BMW 4 Series Gran Coupe 2.0 420i M Sport Auto xDrive Euro 6 (s/s) 5dr
    • 2018
    • •
    • 78,997 miles
    • •
    • Petrol
    • •
    • Automatic
    Car Planet Barnet

    Icon - location pin London

AA inspected BMW 420 cars

  • Star icon This vehicle has passed an AA inspection
    BMW 4 Series Gran Coupe 2.0 420i M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184 ps)
    BMW 4 Series Gran Coupe 2.0 420i M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184 ps)
    BMW 4 Series Gran Coupe 2.0 420i M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184 ps)
    £11,890
    BMW 4 Series Gran Coupe 2.0 420i M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184 ps)
    • 2017
    • •
    • 89,650 miles
    • •
    • Petrol
    • •
    • Automatic
    Automatic Motors Ltd

    Icon - location pin West Drayton

  • Star icon This vehicle has passed an AA inspection
    BMW 4 SERIES 2.0 420d Sport Coupe 2dr Diesel Auto Euro 6 (s/s) (190 ps)
    BMW 4 SERIES 2.0 420d Sport Coupe 2dr Diesel Auto Euro 6 (s/s) (190 ps)
    BMW 4 SERIES 2.0 420d Sport Coupe 2dr Diesel Auto Euro 6 (s/s) (190 ps)
    £11,450
    BMW 4 SERIES 2.0 420d Sport Coupe 2dr Diesel Auto Euro 6 (s/s) (190 ps)
    • 2015
    • •
    • 53,300 miles
    • •
    • Diesel
    • •
    • Automatic
    Kallenhard Performance Cars

    Icon - location pin Leighton Buzzard

  • Star icon This vehicle has passed an AA inspection
    BMW 4 Series 420d M Sport
    BMW 4 Series 420d M Sport
    BMW 4 Series 420d M Sport
    £17,210
    BMW 4 Series 420d M Sport
    • 2018
    • •
    • 24,960 miles
    • •
    • Diesel
    • •
    • Automatic
    Manamanx

    Icon - location pin Reading

Icon - car with tick symbol

Want extra reassurance before buying?

Consider a pre-purchase vehicle inspection. An independent AA mechanic will check for any issues, helping you avoid costly surprises.

Book a vehicle inspection
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Selling made easy with a free instant valuation

Enter your reg number below to get a valuation estimate from our trusted partner Motorway.

If you proceed to sell your vehicle through Motorway, a service fee will be applicable upon sale, calculated based on the final sale price. See the Motorway website for more information.

Please note: If you tap 'Get a valuation' you will be taken directly to the Motorway website.

Latest BMW 420 HP finance deals

AA Car Finance is provided by Evolution Funding Ltd. Used Car Sites Limited, on behalf of AA Financial Services Limited, introduces you to Evolution and are each acting as credit brokers and not lenders. AA Financial Services Limited receives a commission from Evolution Funding Ltd, which can vary based on the lender and vehicle selected. By submitting an application for car finance you consent to the commission being paid and acknowledge AA Financial Services Limited is not acting impartially.
  • BMW 4 Series 2.0 420d SE Auto Euro 6 (s/s) 2dr
    BMW 4 Series 2.0 420d SE Auto Euro 6 (s/s) 2dr
    BMW 4 Series 2.0 420d SE Auto Euro 6 (s/s) 2dr

    From £170 p/m

    £7,750
    BMW 4 Series 2.0 420d SE Auto Euro 6 (s/s) 2dr
    • 2016
    • •
    • 105,000 miles
    • •
    • Diesel
    • •
    • Automatic
    Car City (Luton) Limited

    Icon - location pin Luton

    More details >
  • BMW 4 Series Gran Coupe 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p
    BMW 4 Series Gran Coupe 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p
    BMW 4 Series Gran Coupe 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p

    From £185 p/m

    £8,440
    BMW 4 Series Gran Coupe 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p
    • 2016
    • •
    • 116,801 miles
    • •
    • Diesel
    • •
    • Manual
    West Brook Car Sales

    Icon - location pin Peterborough

    More details >
  • BMW 4 SERIES GRAN COUPE 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p
    BMW 4 SERIES GRAN COUPE 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p
    BMW 4 SERIES GRAN COUPE 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p

    From £197 p/m

    £8,995
    BMW 4 SERIES GRAN COUPE 2.0 420d M Sport Hatchback 5dr Diesel Manual Euro 6 (s/s) (190 p
    • 2016
    • •
    • 110,400 miles
    • •
    • Diesel
    • •
    • Manual
    Coventry Sterling Motors Ltd

    Icon - location pin Coventry

    More details >

Finance representative example (Hire Purchase)

Borrowing £10,000 at a representative APR of 11.9%

59 monthly payments
£218.83
Final payment
£228.83
Fixed interest rate
11.9%
Representative APR
11.9%
Cost of credit
£3,139.80*
Total amount payable
£13,139.80
*The representative example includes an estimated option to purchase fee of £10. This is subject to status and although fees may vary in amount and when payable, the total cost of credit and APR received will not alter. This representative example is for illustration purposes only and does not constitute an offer. Written quotations are available on request and finance is subject to status.

BMW 420 cars from Manufacturer Approved Dealers

Vehicles inspected by the dealer to ensure they meet the manufacturer's standards
  • BMW 420 2.0 420d M Sport Hatchback 5dr Diesel Auto Euro 6 (s/s) (190 ps)
    £12,990
    BMW 4 Series Gran Coupe 2.0 420d M Sport Hatchback 5dr Diesel Auto Euro 6 (s/s) (190 ps)
    • 2017
    • •
    • 71,700 miles
    • •
    • Diesel
    • •
    • Automatic
    Automatic Motors Ltd

    Icon - location pin West Drayton

  • BMW 420 2.0 420i Sport Coupe 2dr Petrol Manual Euro 6 (s/s) (184 ps)
    £7,390
    BMW 4 Series 2.0 420i Sport Coupe 2dr Petrol Manual Euro 6 (s/s) (184 ps)
    • 2014
    • •
    • 84,700 miles
    • •
    • Petrol
    • •
    • Manual
    Automatic Motors Ltd

    Icon - location pin West Drayton

  • Star icon This vehicle has passed an AA inspection
    BMW 420 2.0 420i M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184 ps)
    £11,890
    BMW 4 Series Gran Coupe 2.0 420i M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184 ps)
    • 2017
    • •
    • 89,650 miles
    • •
    • Petrol
    • •
    • Automatic
    Automatic Motors Ltd

    Icon - location pin West Drayton

  • BMW 420 420i M Sport 5dr Step Auto
    £25,890
    BMW 4 Series Gran Coupe 420i M Sport 5dr Step Auto
    • 2022
    • •
    • 28,185 miles
    • •
    • Petrol
    • •
    • Semiauto
    Marshall Audi Maidstone

    Icon - location pin Maidstone

  • AA finance available

    BMW 420 2.0 420i M Sport Auto Euro 6 (s/s) 2dr
    £22,091
    BMW 4 Series 2.0 420i M Sport Auto Euro 6 (s/s) 2dr
    • 2022
    • •
    • 53,812 miles
    • •
    • Petrol
    • •
    • Automatic
    Quality Part X Ltd Dunstable

    Icon - location pin Dunstable

  • AA finance available

    BMW 420 2.0 420i GPF M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184
    £14,796
    BMW 4 Series Gran Coupe 2.0 420i GPF M Sport Hatchback 5dr Petrol Auto Euro 6 (s/s) (184
    • 2021
    • •
    • 79,471 miles
    • •
    • Petrol
    • •
    • Automatic
    Quality Part X Ltd Dunstable

    Icon - location pin Dunstable

Why buy through The AA

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Trusted dealers only

All dealers have committed to AA Cars Standards to give you peace of mind.

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All vehicles checked

Vehicle history, MOT, mileage, accident and police reports are all checked - on every vehicle.

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Exclusive AA offers

12 months free breakdown cover (or discounted upgrade if you're an AA member) and £75 off a Service & MOT. T&Cs apply.

Hybrid used BMW 420 cars in stock

  • BMW 4 SERIES 2.0 420d MHT M Sport Auto Euro 6 (s/s) 2dr
    BMW 4 SERIES 2.0 420d MHT M Sport Auto Euro 6 (s/s) 2dr
    BMW 4 SERIES 2.0 420d MHT M Sport Auto Euro 6 (s/s) 2dr
    £17,495
    BMW 4 SERIES 2.0 420d MHT M Sport Auto Euro 6 (s/s) 2dr
    • 2021
    • •
    • 127,230 miles
    • •
    • Hybrid
    • •
    • Automatic
    NR Automotive Ltd

    Icon - location pin Greenford

  • AA finance available

    BMW 4 Series 2.0 420d MHT M Sport Auto xDrive Euro 6 (s/s) 2dr
    BMW 4 Series 2.0 420d MHT M Sport Auto xDrive Euro 6 (s/s) 2dr
    BMW 4 Series 2.0 420d MHT M Sport Auto xDrive Euro 6 (s/s) 2dr
    £21,674
    BMW 4 Series 2.0 420d MHT M Sport Auto xDrive Euro 6 (s/s) 2dr
    • 2021
    • •
    • 84,376 miles
    • •
    • Diesel Hybrid
    • •
    • Automatic
    Hiltop Motors

    Icon - location pin Rainham

  • BMW 4 Series Gran Coupe 420d M Sport Gran Coupe
    BMW 4 Series Gran Coupe 420d M Sport Gran Coupe
    BMW 4 Series Gran Coupe 420d M Sport Gran Coupe
    £27,290
    BMW 4 Series Gran Coupe 420d M Sport Gran Coupe
    • 2022
    • •
    • 29,043 miles
    • •
    • Diesel Hybrid
    • •
    • Automatic
    Prestige Cars Kent

    Icon - location pin Orpington

The BMW 420 at a glance

The 420 is an engine designation within the 4 Series and is available in Coupé, Gran Coupé, and Convertible body styles. For the diesel, the 420d uses a 2.0-litre four-cylinder turbo diesel engine that develops around 190hp with 400Nm of peak torque. Meanwhile, the 420i petrol uses a 2.0-litre four-cylinder turbo petrol engine that develops 184hp and 300Nm of torque. If you do a lot of miles, the 420d is the better option, but having said that, you can’t really go wrong with the 420i either.

Pros

  • Icon - tickGood handling and body control
  • Icon - tick Frugal diesel engine
  • Icon - tick Interior quality

Cons

  • Icon - cross Limited head room due to coupé-like design
  • Icon - cross Firm ride (sportier trims)
  • Icon - cross High running costs

Hire Purchase (HP)

HP is a finance plan that allows you to spread the cost of the car by making monthly payments over an agreed term.

You make higher monthly payments than a Personal Contract Purchase (PCP) agreement, so that when you come to the end of the agreement you'll own the car.

Unlike PCP, there are no limits on mileage.

HP could be right for you if want to own the car at the end of the agreement, without the need to make a larger final payment.

  • What are the key safety features of the BMW 420?

    The BMW 420 comes with all the expected standard safety kit. This includes a number of airbags, automatic emergency braking, lane-departure warning, adaptive cruise and blind-spot monitoring. Furthermore, the 4 Series coupe scored a five-star Euro NCAP rating in 2019.

  • What engine options are available with the BMW 420?

    The 420i uses a 2.0-litre turbocharged petrol, while the 420d gets a 2.0-litre four-cylinder diesel that offers brisk performance with good fuel economy. Some 420 models are available with BMW's xDrive all-wheel-drive system.

  • What are the standard technology and infotainment features in the BMW 420?

    Most BMW 420s offer the iDrive infotainment system with a touchscreen featuring an intuitive rotary controller, digital instruments, DAB radio and navigation, plus Bluetooth and Apple CarPlay/Android Auto. M Sport models can add flashier trim and more tech, like adaptive suspension and upgraded sound system.

  • What is the fuel consumption of the BMW 420?

    The 420i petrol returns between 40–44mpg, depending on the year and driving style, while the 420d diesel achieves up to 60mpg in real-world use.

  • What should I check when buying a used BMW 420?

    Check that the 420 model comes with a full BMW service history, as these cars benefit from scheduled and meticulous maintenance. Inspect for any dashboard warning lights, infotainment or electrical faults, and uneven tyre wear. If you are unsure, we can help with the AA Vehicle Inspection service.

  • Are BMW 420 cars reliable?

    As you'd expect from BMW, 420 models are well built and generally reliable, provided the vehicle has been maintained to manufacturer standards. Some owners report occasional electrical issues or sensor faults. Earlier 420d models with the N47 engine also suffer from premature timing chain wear. It’s also worth noting that, being a premium German brand, parts tend to be on the expensive side.

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Vehicle Inspections

The AA recommends an AA Cars Vehicle Inspection before purchase. Not all cars are mechanically checked by the AA.

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