MG Montego 2.0L Petrol Engines
from £850 to £2,400
Rebuilt units from £850 · Common codes: 20M2F, 20T2F, 20T4F
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MG Montego Engine Replacement - Rebuilt & Performance Options Available
Get quotes from trusted UK MG Montego engine specialists. Compare rebuilt and performance reconditioned prices for 20H and O-Series - 2.0L turbo covered. Find UK performance engine specialists.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
MG Montego 2.0L Diesel Engines
from £950 to £2,600
Rebuilt units from £950 · Common codes: 4.100, 4.108
MG Montego 1.3L Classic Petrol Engines
from £750 to £1,900
Rebuilt units from £750 · Common codes: A+, 12H894
Instant engine replacement quote - 100% free, no obligation
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Compare reconditioned, rebuilt & used engine prices
Supply & fit available - parts and labour from vetted specialistsInstant engine replacement quote - 100% free, no obligationEngine replacement near me - UK-wide specialist networkCompare reconditioned, rebuilt & used engine pricesSupply & fit available - parts and labour from vetted specialistsHow It Works
3 Simple Steps3 Simple Stepsto Finding the Best MG Montego Replacement Engineto Finding the Best MG Montego Replacement Engine
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers
Most replacements completed within 3-5 days.
Live UK Engine Market Data
Average Market Prices
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↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
Trusted by MG Montego Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used MG Montego engines through EngineMarket.
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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“Got three quotes within an hour and chose the best deal easily. The whole process was quick, clear and stress-free.”
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“I wasn't sure what I needed, but they helped me identify the right engine and connected me with a trusted garage.”
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“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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Variants We Cover
MG Montego Engine ReplacementAll Variants Covered
MG Montego 1.3 L
A+ Series 1.3L Petrol
Rebuilt Engines: £750-£1,900
MG Montego 1.6 HL
S-Series 1.6L Petrol
Rebuilt Engines: £800-£2,100
MG Montego 2.0 HLS
S-Series 2.0L Petrol
Rebuilt Engines: £850-£2,400
MG Montego 2.0 Injection
O-Series 2.0L Petrol
Rebuilt Engines: £900-£2,500
MG Montego MG 1.6
S-Series 1.6L Petrol
Rebuilt Engines: £950-£2,600
MG Montego MG 2.0
S-Series 2.0L Petrol
Rebuilt Engines: £1,100-£2,900
MG Montego 2.0 Diesel
Perkins Prima 4.100 Diesel
Rebuilt Engines: £950-£2,600
MG Montego 2.0 Turbo Diesel
Perkins Prima 4.108 Diesel
Rebuilt Engines: £1,200-£3,100
MG Montego Estate 1.6
S-Series 1.6L Petrol
Rebuilt Engines: £800-£2,100
MG Montego Estate 2.0
S-Series 2.0L Petrol
Rebuilt Engines: £850-£2,400
MG Montego Vanden Plas 2.0
S-Series 2.0L Petrol
Rebuilt Engines: £900-£2,500
MG Montego 2.0 Carburettor
S-Series 2.0L Petrol
Rebuilt Engines: £850-£2,400
Not sure which variant your MG Montego is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
Montego
Engine Codes
MG Montego Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the MG Montego across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Petrol Engines
Extracted from detailed petrol and performance engine families across MG Montego variants.
A+ / 12H894 - 1.3L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
1.3 L1.3 HLEstate 1.3
Avg. rebuilt price
£750 - £1,900
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 1.3L
- Power output
- 69 hp
- Years fitted
- 1984-1994
Common failures
- ●Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
- ●Confirm exact engine code and fitment before ordering.
- ●Ask for warranty and supply & fit terms.
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK MG Montego engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Montego
Common Problems
MG Montego Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The MG Montego's S-Series petrol and Perkins Prima diesel engines are generally robust but have well-documented failure points that drive replacement enquiries. Head gasket failures on the 2.0L S-Series and injector pump wear on the Perkins diesel are the most common issues. Every rebuilt engine supplied through EngineMarket includes upgraded internal...
MG Montego S-Series Head Gasket Failure - Why 2.0L Engines Fail Prematurely
MG Montego S-Series Head Gasket Failure
Most affected vehicles
MG Montego 2.0 L2.0 HLS
MG Montego 2.0 L, 2.0 HLS, MG 2.0, Vanden Plas 2.0, Estate 2.0 (1984-1994, S-Series 20M2F/20T2F)
Failure mileage range
70,000-100,000 miles
Typical failure window
Root cause
Original composite head gasket degrades under thermal cycling; plastic thermostat housing cracks exacerbate overheating risk.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Preventative Gasket Upgrade | £650 - £950 | £450 - £750 | MLS head gasket replacement, thermostat housing upgrade, coolant system flush | Viable if caught early before overheating damage; not suitable if head warping has occurred |
| Intermediate - Cylinder Head Reconditioning | £1,200 - £1,800 | £850 - £1,400 | Head removal, crack testing, valve seat reconditioning, new gasket set, timing components | Suitable if block is undamaged; extends life but doesn't address block wear |
| Full Replacement - Rebuilt S-Series Engine | £2,800 - £4,200 | £1,500 - £2,400 | Complete rebuilt engine with MLS gasket upgrade, tensioner fix, bench testing, 12-month warranty | Best value for high-mileage Montegos; addresses all wear points, includes warranty |
Our recommendation
On a classic MG Montego valued at £1,500-£4,000, a full rebuilt engine often represents better long-term value than repeated repairs. If your S-Series has exceeded 90k miles or shows signs of overheating damage, replacement with an upgraded unit is the most reliable solution for restoration projects.
Compare rebuilt S-Series engine prices for your MG MontegoReplacement Engine Options
MG Montego Engine TypesOptions, Costs & What to Expect
Every MG Montego engine type is available through our UK network with typical price ranges based on variant, engine code and budget.
MG Montego Reconditioned Engines (Recon)£750 - £2,400((supply only))
MG Montego Rebuilt Engines£850 - £2,900((supply only))
MG Montego Used Engines£450 - £1,600((supply only))
MG Montego Remanufactured Engines£1,200 - £3,400((supply only))
MG Montego Refurbished Engines£600 - £1,800((supply only))
Compare MG Montego engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific MG Montego within hours.
Engine Sizes
MG Montego Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the MG Montego is listed below, with compatible engine codes, production years and common failure notes to help you identify the right replacement.
The smallest petrol option for the Montego, the A+ Series 1.3L powered entry-level L and HL trims throughout production, offering simple carburettor reliability and easy maintenance for classic car enthusiasts on a budget.
⚙
Engine Code(s)
A+, 12H894
▣
Compatible Models (UK)
1.3 L (1984-1994), 1.3 HL (1984-1990), Estate 1.3
ϟ
Power output
Verified by registration
△
Common Failure Points
Head gasket failure, SU carburettor flooding, oil seal wear on high-mileage units
Production Years: 1984-1994
Compare MG Montego 1.3L petrol engine pricesFuel Type
MG Montego Engines by Fuel Type
Choose your MG Montego engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the simple 1.3L carburettor petrol to the torquey Perkins diesel.
MG Montego Diesel Engines
DieselPerkins Prima diesel engines powered Montego variants from 1989-1994, offering strong economy and torque but requiring attention to injector pump maintenance on high-mileage examples.
Common MG Montego Diesel Engine Families
- •4.100 - naturally aspirated 2.0L diesel (2.0 Diesel, Estate), injector pump wear common after 100k miles
- •4.108 - turbocharged 2.0L diesel (2.0 Turbo Diesel), adds boost system maintenance considerations
Found In
- •Pre-facelift & facelift saloon/estate (1989-1994) - 4.100, 4.108
Known For
- •Strong low-end torque ideal for laden estate variants
- •Injector pump replacement cost can approach rebuilt engine price
- •Glow plug system critical for reliable cold starting in UK winters
Typical Diesel Models
- •2.0 Diesel
- •Estate 2.0 Diesel
- •2.0 Turbo Diesel
1 of 2
MG Montego Diesel Engines
DieselPerkins Prima diesel engines powered Montego variants from 1989-1994, offering strong economy and torque but requiring attention to injector pump maintenance on high-mileage examples.
Common MG Montego Diesel Engine Families
- •4.100 - naturally aspirated 2.0L diesel (2.0 Diesel, Estate), injector pump wear common after 100k miles
- •4.108 - turbocharged 2.0L diesel (2.0 Turbo Diesel), adds boost system maintenance considerations
Found In
- •Pre-facelift & facelift saloon/estate (1989-1994) - 4.100, 4.108
Known For
- •Strong low-end torque ideal for laden estate variants
- •Injector pump replacement cost can approach rebuilt engine price
- •Glow plug system critical for reliable cold starting in UK winters
Typical Diesel Models
- •2.0 Diesel
- •Estate 2.0 Diesel
- •2.0 Turbo Diesel
MG Montego Petrol Engines
PetrolA+ and S-Series petrol engines powered the Montego range from launch, with the 2.0L S-Series being the most common replacement enquiry due to head gasket and timing chain failure patterns.
Common MG Montego Petrol Engine Families
- •A+ 1.3L - simple carburettor petrol (1.3 L/HL), head gasket and carb flooding issues
- •S-Series 1.6L/2.0L - core petrol range (most variants), head gasket and thermostat housing weaknesses
- •O-Series 2.0L injection - Lucas fuel injection variant (2.0i), airflow meter and ECU considerations
Found In
- •Launch models (1984-1987) - A+, early S-Series
- •Facelift models (1988-1994) - S-Series, O-Series injection, MG performance variants
Known For
- •S-Series head gasket failures dominate replacement enquiries for 2.0L petrol Montegos
- •Timing chain tensioner wear causes rattle and oil pressure warnings on high-mileage units
- •SU carburettor models require specialist calibration for authentic classic restoration
Typical Petrol Models
- •1.3 L, 1.3 HL
- •1.6 L, 1.6 HL
- •2.0 L, 2.0 HLS, 2.0 Carburettor, 2.0 Injection
Not sure which fuel type your MG Montego has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK MG Montego specialists.
Engine YearsGet quotes for 1984-1987 MG Montego replacement engines →
MG Montego Engines by YearWhat Was Fitted & WhenMG Montego Engines by Year - What Was Fitted & When
This section covers all major engine changes across the MG Montego's 1984-1994 production timeline, organised so owners can quickly identify their engine and compare rebuilt engine prices from UK specialists.
⚙Key Changes
- ✓MG Montego introduced with 1.3L A+ and 1.6L/2.0L S-Series petrol engines
- ✓Carburettor fuel delivery standard across all variants
- ✓Estate body style added to range in 1984
▣Main Engines
A+/ 12H894 - 1.3L petrol (1.3 L, 1.3 HL)
20M4/ 20T4 - 1.6L petrol (1.6 L, 1.6 HL)
20M2F/ 20T2F - 2.0L petrol (2.0 L, 2.0 HLS)
▰Popular Models
- •MG Montego 1.3 L
- •MG Montego 1.6 HL
- •MG Montego 2.0 HLS
- •MG Montego Estate 2.0
🔧Known For
- ✓Simple carburettor systems easy to maintain for classic enthusiasts
- ✓Early S-Series units show head gasket vulnerability after 80k miles
- ✓Plastic thermostat housing becomes brittle with age, prone to cracking
- ✓Strong enthusiast community supports authentic restoration projects
Engine Codes Covered:
A+12H89420M420T420M2F20T2FNot sure which year your MG Montego was built- Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12-month warranty from UK MG Montego specialists.
FAQ