2015 Buick Regal — Full Specifications
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The 2015 Buick Regal is a saloon/sedan offered with 2 engines (2L 4-cyl turbo, 2.4L 4-cyl). Its most fuel-efficient configuration returns around 29 mpg (UK) / 24 mpg (US EPA) combined, with 26–34 mpg (UK) across all configurations. A hybrid version is also listed by EPA (2.4L 4-cyl), returning around 34 mpg (UK) combined. Owners often keep a Buick Regal workshop manual to hand for servicing and repairs.
Compared with the 2014 Buick Regal: Fuel economy is essentially unchanged at around 29 mpg (UK) combined. The engine line-up listed by EPA is unchanged. It carries the same 5★ overall NHTSA rating.
Full Specifications
| Engine (most efficient) | 2L 4-cyl turbo |
|---|---|
| Engine options | 2L 4-cyl turbo · 2.4L 4-cyl |
| Transmission (most efficient) | Manual 6-spd |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 98 cu ft (2,775 L) |
| Luggage Volume (EPA) | 13 cu ft (368 L) |
| Fuel Economy (UK) | 29 combined / 24 urban / 37 extra-urban mpg |
| Fuel Economy (US EPA) | 24 combined / 20 city / 31 highway mpg |
| CO₂ Emissions | 231 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,800 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 5 configurations for the 2015 Buick Regal across 2 engines (2L 4-cyl turbo, 2.4L 4-cyl). Combined fuel economy ranges from 22 to 28 mpg (US), or 26 to 34 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 (S6) | All-Wheel Drive | 26 | 22 (19/27) | 253 | $3,050 |
| 2L 4-cyl turbo | Automatic (S6) | Front-Wheel Drive | 29 | 24 (21/29) | 232 | $2,800 |
| 2L 4-cyl turbo | Manual 6-spd | Front-Wheel Drive | 29 | 24 (20/31) | 231 | $2,800 |
| 2.4L 4-cyl (Hybrid) | Automatic (S6) | Front-Wheel Drive | 34 | 28 (24/35) | 195 | $2,400 |
| 2.4L 4-cyl | Automatic (S6) | Front-Wheel Drive | 28 | 23 (19/30) | 237 | $2,900 |
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 13 cubic feet (about 368 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2015 Buick Regal
Running Costs: 2015 Buick Regal
Covering around 8,000 miles a year in a 2015 Buick Regal at 29 mpg combined, expect roughly 1,254 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,800 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.
2015 Buick Regal Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists no safety recall campaigns for the 2015 Buick Regal as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
Owners have filed 33 complaints with NHTSA about the 2015 Buick Regal. The most-reported areas are Engine (9), Exterior lighting (8), Electrical system (5). Complaints include 1 reported crash, 1 reported fire, 3 reported injuries. That is close to the median of 36 complaints across the 10 Buick Regal model years in our data.
Used-buyer checklist for the 2015 Buick Regal
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Engine (9 owner complaints) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
- Lighting (8 owner complaints) — Check every exterior light works and look for moisture inside the lamp housings.
- Electrical system (5 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
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
At 29 mpg (UK) combined it sits close to the 29 mpg average for Buick models in our database.
Of the 10 Buick Regal model years we cover, the 2015 ranks 4th for combined fuel economy on its best configuration (29 mpg UK combined, against a high of 31 mpg). 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 2015 Buick Regal
Frequently Asked Questions
What engine does the 2015 Buick Regal have?
EPA lists 2 engines for the 2015 Buick Regal: 2L 4-cyl turbo, 2.4L 4-cyl. The most fuel-efficient configuration pairs the 2L 4-cyl turbo with a manual 6-spd.
What is the fuel economy of the 2015 Buick Regal?
The most efficient configuration returns around 29 mpg (UK) combined, or 24 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 26 to 34 mpg. The hybrid version returns around 34 mpg (UK) combined.
How much does the 2015 Buick Regal cost to fuel per year?
The US EPA estimates about $2,800 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 2015 Buick Regal have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 4 stars for frontal crash protection.
Does the 2015 Buick Regal have any recalls?
NHTSA lists no safety recall campaigns for the 2015 Buick Regal as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
What are the most common problems reported for the 2015 Buick Regal?
Among the 33 owner complaints filed with NHTSA, the most-reported areas are Engine (9 complaints), Exterior lighting (8 complaints), Electrical system (5 complaints). 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 2015 Buick Regal have?
EPA measures interior passenger volume at 98 cubic feet (about 2,775 litres) and luggage volume at 13 cubic feet (about 368 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.