2020 Buick Regal — Full Specifications
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The 2020 Buick Regal is a hatchback offered with 2 engines (2L 4-cyl turbo, 3.6L 6-cyl). Its most fuel-efficient configuration returns around 31 mpg (UK) / 26 mpg (US EPA) combined, with 26–31 mpg (UK) across all configurations. Owners often keep a Buick Regal workshop manual to hand for servicing and repairs.
Compared with the 2019 Buick Regal: Fuel economy is essentially unchanged at around 31 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine (most efficient) | 2L 4-cyl turbo |
|---|---|
| Engine options | 2L 4-cyl turbo · 3.6L 6-cyl |
| Transmission (most efficient) | Automatic (S9) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Hatchback |
| Passenger Volume (EPA) | 98 cu ft (2,775 L) |
| Luggage Volume (EPA) | 18 cu ft (510 L) |
| Fuel Economy (UK) | 31 combined / 26 urban / 38 extra-urban mpg |
| Fuel Economy (US EPA) | 26 combined / 22 city / 32 highway mpg |
| CO₂ Emissions | 213 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,150 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 3 configurations for the 2020 Buick Regal across 2 engines (2L 4-cyl turbo, 3.6L 6-cyl). Combined fuel economy ranges from 22 to 26 mpg (US), or 26 to 31 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 2L 4-cyl turbo | Automatic (S8) | All-Wheel Drive | 29 | 24 (21/29) | 227 | $3,400 |
| 2L 4-cyl turbo | Automatic (S9) | Front-Wheel Drive | 31 | 26 (22/32) | 213 | $3,150 |
| 3.6L 6-cyl | Automatic (S9) | All-Wheel Drive | 26 | 22 (19/27) | 255 | $3,050 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 98 cubic feet (about 2,775 litres) and luggage volume at 18 cubic feet (about 510 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2020 Buick Regal
Running Costs: 2020 Buick Regal
Covering around 8,000 miles a year in a 2020 Buick Regal at 31 mpg combined, expect roughly 1,173 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,150 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2020 Buick Regal Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 2 safety recall campaigns that include the 2020 Buick Regal (as of 6 October 2026). Most affected areas: Service brakes (1), Seats (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Service brakes — campaign 22V465000, reported 30 June 2022. Risk: A loss of power brake assist can extend the distance required to stop the vehicle, increasing the risk of a crash.
- Seats — campaign 19V762000, reported 24 October 2019. Risk: Seats with improper welds may not provide adequate protection in the event of a crash, increasing the risk of an injury.
Owners have filed 5 complaints with NHTSA about the 2020 Buick Regal. The most-reported areas are Electrical system (1), Tires (1), Seats (1). That is well below the median of 36 complaints across the 10 Buick Regal model years in our data.
Used-buyer checklist for the 2020 Buick Regal
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Seats (1 recall campaign · 1 owner complaint) — Check seat adjusters, head restraints and seat-mounted sensors work, and confirm seat recalls were completed.
- Brakes (1 recall campaign) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
- Electrical system (1 owner complaint) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Tyres (1 owner complaint) — Check tyre age and wear and ask about any tyre recalls.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
Buick models in our database average about 29 mpg (UK) combined on their most efficient configuration; the 2020 Buick Regal's 31 mpg is 2 mpg above that make average. Its 213 g/km CO₂ figure is 20 g/km lower than the 233 g/km Buick average.
Of the 10 Buick Regal model years we cover, the 2020 is the most economical on its best configuration (31 mpg UK combined). See every Buick Regal year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2020 Buick Regal
Frequently Asked Questions
What engine does the 2020 Buick Regal have?
EPA lists 2 engines for the 2020 Buick Regal: 2L 4-cyl turbo, 3.6L 6-cyl. The most fuel-efficient configuration pairs the 2L 4-cyl turbo with a automatic (s9).
What is the fuel economy of the 2020 Buick Regal?
The most efficient configuration returns around 31 mpg (UK) combined, or 26 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 26 to 31 mpg.
How much does the 2020 Buick Regal cost to fuel per year?
The US EPA estimates about $3,150 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2020 Buick Regal have any recalls?
NHTSA lists 2 safety recall campaigns that include the 2020 Buick Regal (as of 6 October 2026). Most affected areas: Service brakes (1), Seats (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2020 Buick Regal?
Among the 5 owner complaints filed with NHTSA, the most-reported areas are Electrical system (1 complaint), Tires (1 complaint), Seats (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2020 Buick Regal have?
EPA measures interior passenger volume at 98 cubic feet (about 2,775 litres) and luggage volume at 18 cubic feet (about 510 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.