The fuel consumption of a Rolls-Royce depends on the specific model, engine type, and driving conditions. Rolls-Royce vehicles, which are luxury cars, are designed for performance, comfort, and refinement rather than fuel efficiency. Therefore, fuel consumption tends to be higher than that of mass-market sedans or smaller vehicles. Here's a breakdown of the typical fuel consumption for some of the recent Rolls-Royce models:

1. Rolls-Royce Phantom

• Engine: 6.75-liter V12 twin-turbocharged engine
• Fuel Economy (combined): Approximately 15–17 mpg (miles per gallon) or around 15–16 L/100 km (liters per 100 kilometers).
• City/Highway Fuel Economy: In city driving, the Phantom may consume around 13–14 mpg, while highway driving may see up to 18 mpg.

The Phantom, being Rolls-Royce’s flagship sedan, is designed for ultimate luxury, so while fuel economy isn't a priority, it offers a balance of power and comfort.

2. Rolls-Royce Ghost

• Engine: 6.75-liter V12 twin-turbocharged engine
• Fuel Economy (combined): Around 15–16 mpg (15–16 L/100 km).
• City/Highway Fuel Economy: Around 13–14 mpg in the city, and up to 17–18 mpg on the highway.

The Ghost is a slightly more performance-oriented vehicle compared to the Phantom but still falls within a similar fuel consumption range, given that both models share a similar engine platform.

3. Rolls-Royce Cullinan (SUV)

• Engine: 6.75-liter V12 twin-turbocharged engine
• Fuel Economy (combined): Around 14–15 mpg (16–17 L/100 km).
• City/Highway Fuel Economy: The Cullinan tends to have 12–13 mpg in urban driving, with better efficiency on highways, reaching around 17–18 mpg.

The Cullinan, being an SUV, is larger and heavier than the sedans, so its fuel consumption tends to be slightly lower than the sedans in terms of miles per gallon. However, the Cullinan is still considered relatively fuel-inefficient due to its size, luxury features, and powerful engine.

4. Rolls-Royce Wraith

• Engine: 6.6-liter V12 twin-turbocharged engine
• Fuel Economy (combined): Around 14–15 mpg (16–17 L/100 km).
• City/Highway Fuel Economy: The Wraith performs slightly better on highways, where it may reach 16–17 mpg, but city driving might bring it down to 12–13 mpg.

The Wraith is a high-performance coupe, so its fuel efficiency is typical for a luxury performance car with a large engine.

5. Rolls-Royce Dawn

• Engine: 6.6-liter V12 twin-turbocharged engine
• Fuel Economy (combined): Similar to the Wraith, around 14–15 mpg (16–17 L/100 km).
• City/Highway Fuel Economy: In city driving, the Dawn is likely to consume 12–13 mpg, while highway driving may see it achieve 15–16 mpg.

The Dawn, a convertible variant of the Wraith, shares similar powertrain characteristics, and therefore its fuel consumption is very close to that of the Wraith.

Key Considerations:

• Luxury Performance: Rolls-Royce cars are engineered for luxury, performance, and refinement, which often leads to higher fuel consumption compared to non-luxury vehicles, particularly because of their large engines, significant weight, and the advanced technologies used to deliver smooth, powerful driving experiences.
• Size and Weight: Rolls-Royce vehicles are large, heavy, and equipped with powerful V12 engines, all of which contribute to their relatively lower fuel efficiency.
• Driving Style and Conditions: Fuel economy can vary significantly depending on driving conditions (city vs. highway), driving style (aggressive acceleration vs. smooth cruising), and even weather conditions (cold weather can reduce fuel efficiency). However, for most owners, the focus is on comfort, luxury, and performance rather than fuel efficiency.

Comparison to Other Vehicles

To provide some perspective, typical luxury sedans or performance cars, such as the Mercedes-Benz S-Class or BMW 7 Series, usually have fuel consumption figures in the 20–25 mpg range for their V6 or V8-powered models. Rolls-Royce cars, by comparison, are more focused on luxury and performance than fuel economy, so their consumption is relatively higher.

Conclusion

Rolls-Royce vehicles are not known for their fuel efficiency due to their large, high-performance engines and luxury features. On average, a Rolls-Royce will consume around 14–17 mpg (or about 15–17 L/100 km) in combined city and highway driving. However, for many Rolls-Royce buyers, the luxury, comfort, and driving experience take precedence over fuel efficiency.