2019 Acura RLX — Full Specifications
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The 2019 Acura RLX is a saloon/sedan powered by a 3.5L 6-cyl premium gasoline engine. Its most fuel-efficient configuration returns around 28 mpg (UK) / 23 mpg (US EPA) combined, with 28–34 mpg (UK) across all configurations. A hybrid version is also listed by EPA (3.5L 6-cyl), returning around 34 mpg (UK) combined. Owners often keep a Acura RLX workshop manual to hand for servicing and repairs.
Compared with the 2018 Acura RLX: Fuel economy is essentially unchanged at around 28 mpg (UK) combined. The engine line-up listed by EPA is unchanged. It carries the same 5★ overall NHTSA rating.
Full Specifications
| Engine | 3.5L 6-cyl |
|---|---|
| Transmission | Automatic (S10) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Saloon/Sedan |
| Length | 4982 mm |
| Width | 1890 mm |
| Height | 1465 mm |
| Passenger Volume (EPA) | 102 cu ft (2,888 L) |
| Luggage Volume (EPA) | 15 cu ft (425 L) |
| Fuel Economy (UK) | 28 combined / 24 urban / 35 extra-urban mpg |
| Fuel Economy (US EPA) | 23 combined / 20 city / 29 highway mpg |
| CO₂ Emissions | 238 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,550 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2019 Acura RLX, all with the 3.5L 6-cyl engine. Combined fuel economy ranges from 23 to 28 mpg (US), or 28 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 |
|---|---|---|---|---|---|---|
| 3.5L 6-cyl (Hybrid) | Automatic (AM-S7) | All-Wheel Drive | 34 | 28 (28/29) | 196 | $2,950 |
| 3.5L 6-cyl | Automatic (S10) | Front-Wheel Drive | 28 | 23 (20/29) | 238 | $3,550 |
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 102 cubic feet (about 2,888 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2019 Acura RLX
Running Costs: 2019 Acura RLX
Covering around 8,000 miles a year in a 2019 Acura RLX at 28 mpg combined, expect roughly 1,299 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,550 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.
2019 Acura RLX Safety Ratings (NHTSA)
How It Compares
At 28 mpg (UK) combined it sits close to the 29 mpg average for Acura models in our database.
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 2019 Acura RLX
Frequently Asked Questions
What engine does the 2019 Acura RLX have?
It's fitted with a 3.5L 6-cyl premium gasoline engine, paired with a automatic (s10) transmission.
What is the fuel economy of the 2019 Acura RLX?
The most efficient configuration returns around 28 mpg (UK) combined, or 23 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 28 to 34 mpg. The hybrid version returns around 34 mpg (UK) combined.
How much does the 2019 Acura RLX cost to fuel per year?
The US EPA estimates about $3,550 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 2019 Acura RLX have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 5 stars for frontal crash protection.
How much interior and luggage space does the 2019 Acura RLX have?
EPA measures interior passenger volume at 102 cubic feet (about 2,888 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.