21 MPG combined for the 2025 Land Rover Range Rover P400 LWB MHEV 3.0L 6-cyl is a remarkable figure for a vehicle that defines luxury, commands a significant presence, and weighs in excess of 5,500 pounds in its extended wheelbase form. This isn’t merely an efficient large SUV; it balances opulent comfort and strong capability with an eye toward responsible consumption. A Range Rover buyer isn’t typically making their decision based on a single MPG point, but they are increasingly aware of a vehicle’s environmental footprint and the practicalities of long-distance grand touring. This specific powertrain, the P400, uses a mild-hybrid setup to achieve these numbers, giving it a distinct advantage over its purely internal combustion predecessors and many direct competitors. Engineering allows a vehicle of this stature, renowned for its off-road prowess and on-road refinement, to deliver fuel economy that might surprise some, while still maintaining the effortless power delivery expected from the Range Rover badge. This vehicle is for the individual who demands uncompromising luxury, space, and a sense of occasion, but appreciates the subtle nod to efficiency that the MHEV system provides, making those cross-continental journeys just a little less frequent at the fuel pump.

City and highway performance

The EPA rates the 2025 Range Rover P400 LWB at 19 MPG in the city and 24 MPG on the highway. These figures illustrate the mild-hybrid system’s strength in stop-and-go urban environments and the inherent efficiency of the 3.0L inline-six engine during sustained cruising. In city driving, the MHEV system captures kinetic energy during deceleration, regenerating power that assists the engine during acceleration, reducing strain and thus fuel consumption. This smooth integration means the driver rarely notices the system working, only benefiting from its quiet operation and improved urban mileage. On the highway, the long wheelbase and quiet cabin make for an ideal cruiser. The P400’s 395 horsepower and 406 lb-ft of torque, delivered through an 8-speed automatic transmission, provide ample power for overtaking without needing to constantly dip deep into the throttle, which positively impacts efficiency. The flat torque curve ensures relaxed power delivery, further contributing to the respectable 24 MPG highway figure. For a vehicle designed for extended journeys, often carrying multiple occupants and luggage, this highway economy is a key selling point for those who value refined travel without constant refueling stops.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2025 Land Rover Range Rover P400 LWB MHEV 3.0L 6-cyl to be exactly $2,750 per year. This figure is based on a calculation assuming 15,000 miles of driving per year, split between city and highway, and using national average fuel prices. For a vehicle in this segment, $2,750 represents a tangible cost that prospective owners will consider as part of their overall operating expenses. While the initial purchase price is substantial, understanding the recurring costs such as fuel allows for a complete financial picture. This annual cost reflects the balance that Land Rover has struck between performance, luxury, and the practical demands of daily use and long-distance travel. It demonstrates that despite its commanding presence and powerful engine, the P400 LWB is not an extravagant gas guzzler in the vein of some larger, less efficient SUVs, offering a respectable cost of ownership relative to its capabilities and segment.

Real-world expectations

In real-world driving conditions, the 2025 Range Rover P400 LWB typically meets or slightly exceeds its EPA combined rating, particularly when driven with a smooth, composed style that aligns with the vehicle’s character. Owners of this vehicle aren’t often inclined to drive aggressively, the experience is about grace and power, not outright speed. The mild-hybrid system, with its intelligent stop-start and torque assist, genuinely aids in recovering energy, especially in suburban areas with varying speeds. When venturing off-road, or traversing challenging terrain for which all Land fuel economy data shows the Range Rover was born, expect fuel consumption to increase significantly, these ratings don’t account for extreme conditions. Similarly, if the vehicle is frequently towing or carrying a full complement of passengers and cargo, the P400’s MHEV system will work harder and fuel economy will reflect that increased demand. However, for the vast majority of owners who use this Range Rover for daily commutes, school runs, and luxurious road trips, the 21 MPG combined is a realistic and achievable target. The smooth nature of the powertrain encourages a relaxed driving style that inherently promotes efficiency.

How it compares

Comparing the 2025 Range Rover P400 LWB’s 21 MPG combined to its direct competitors reveals a strong position. Consider the Mercedes-Benz GLS 450 4MATIC, which also uses a 3.0L inline-six with mild-hybrid assistance. It achieves an identical 21 MPG combined (19 city/24 highway), showing that Land Rover is on par with one of its closest rivals in terms of efficiency for a comparable powertrain. The BMW X7 xDrive40i, another premium three-row SUV with a 3.0L inline-six, frequently hits 22 MPG combined (21 city/25 highway), a slight edge, but often with a marginally smaller footprint and less off-road-focused architecture. Cadillac Escalade 6.2L V8 owners, opting for brute force, face a significant drop with figures typically ranging from 16 to 17 MPG combined, underscoring the efficiency benefit of the MHEV system in the Range Rover. For buyers considering a spacious, luxurious SUV, the P400’s numbers demonstrate that opting for the genuine capability and presence of a Range Rover doesn’t necessarily mean sacrificing fuel economy compared to other top-tier options. The P400’s balance is appealing to those who appreciate the distinctive persona and heritage of ROVER MPG across all years, without accepting disproportionately high running costs.

Tips to maximize efficiency

To truly get the most out of your 2025 Range Rover P400 LWB MHEV’s fuel economy, maintaining consistent and smooth throttle inputs is important. The vehicle’s effortless power can tempt heavy acceleration, but allowing the mild-hybrid system to work optimally during gentle starts and stops will yield better results. Use the adaptive cruise control on highways, it helps maintain a steady speed and optimized following distance, reducing unnecessary acceleration and braking, which are major fuel consumers.

Regular maintenance, as outlined in the owner’s manual, is critical for any vehicle, but especially for sophisticated powertrains like the P400’s MHEV. Ensuring tires are properly inflated to the manufacturer’s recommended pressures significantly reduces rolling resistance, directly impacting fuel efficiency. A slightly underinflated tire can lead to a noticeable drop in MPG over time.

Consider using the Range Rover’s various driving modes. While Comfort mode balances performance and efficiency well, eco-focused modes often fine-tune throttle response and transmission shift points for maximum fuel savings. In situations where high performance isn’t necessary, selecting a more conservative driving profile can make a difference.

Lastly, pay attention to excess weight. The Range Rover is already a substantial vehicle, so removing unnecessary items from the cargo area can marginally improve efficiency. Similarly, roof racks or cargo boxes, when not in use, should be removed as they create significant aerodynamic drag, especially at highway speeds.