How Much Higher is the Fuel Consumption of SUVs Compared to Sedans?

[VanRachel]

For vehicles of the same class, with the same displacement, and even the same transmission, SUVs generally consume 1 to 2 liters more fuel per 100 kilometers than sedans. Here are the reasons for the increased fuel consumption: Difference in Weight: SUVs have taller and larger body structures, requiring more high-strength steel. The higher center of gravity also reduces stability compared to sedans, necessitating reinforcement of the A, B, and C pillars. The increased use of steel naturally leads to higher weight. For example, in the A-segment, sedans typically weigh between 1.3 to 1.4 tons, while SUVs range from 1.5 to 1.7 tons. With the same engine displacement, the power-to-weight ratio decreases by approximately 20 horsepower per ton, resulting in about 2 liters more fuel consumption at the same speed. Difference in Aerodynamic Drag: During the design phase, the drag coefficient is carefully considered to minimize wind resistance during driving. However, SUVs, being taller than sedans, have a larger frontal area, leading to higher resistance. At the same speed, greater resistance translates to higher fuel consumption, resulting in a disparity of 1 to 2 liters.

[LeKaleb]

After driving for 20 years, I've noticed that SUVs in the same class generally consume 25%-50% more fuel than sedans. For example, while a 2.0L compact sedan might use 8 liters per 100 kilometers, a SUV with the same displacement could consume 10-12 liters. The main reasons are that SUVs are overweight, being 200-400 kilograms heavier than sedans—equivalent to carrying three extra passengers all the time—and their taller bodies increase the drag coefficient by 20%. However, new technologies can improve this; my hybrid SUV only uses 6.5 liters per 100 kilometers, similar to an old Corolla. If you frequently drive on highways, wind resistance has a greater impact, while in the city, the auto start-stop feature has a minor effect on fuel consumption.

[LaRose]

Last week, I took my family camping and realized how fuel-hungry SUVs can be. My mid-size SUV consumes 13 liters per 100 kilometers, while my friend's sedan only uses a little over 7 liters. Calculating the difference, for a monthly commute of 1,000 kilometers, the extra fuel cost amounts to 300 yuan—enough for two cans of baby formula. The high fuel consumption isn't just due to the vehicle's weight; the comfort-tuned suspension also affects transmission efficiency. Especially in traffic jams, frequent starts and stops can push the fuel consumption to over 15 liters. But those who buy SUVs prioritize practicality. For someone like me, traveling with the family and stuffing the trunk with tents and strollers, the higher fuel consumption is worth it.

[LeMaggie]

After testing six groups of sedans and SUVs from the same brand, we found that the fuel consumption difference mainly lies in three aspects: the body shape increases the drag coefficient by 0.3, leading to a 15% higher fuel consumption at high speeds; the average curb weight is 280kg more, increasing energy consumption by 20%; and the conservative tuning of the AT transmission reduces power conversion efficiency by 5%-8%. However, the gap narrows in urban conditions. In September, driving a sedan and an SUV in the city for a week each, the comprehensive fuel consumption difference was only 1.2 liters. It is recommended to choose a small-displacement turbocharged SUV for better fuel consumption control.

[SanJohn]

The difference in fuel consumption depends on the specific model. For compact SUVs like the CR-V, it consumes 2-3L more fuel than the Civic. Full-size SUVs such as the Teramont can consume up to 5L more than the Passat. The key factor is the tire specification: 225/65 R17 tires have 18% higher rolling resistance than 205/55 R16 tires, directly affecting fuel consumption by 10%. Last week, while helping a friend choose a car, we found that the 4WD version consumes 0.8L more fuel than the 2WD version. If you mainly drive in the city, opting for a smaller-sized SUV is more economical.

[JosephAnn]

I clearly notice my colleague's sedan is more fuel-efficient for daily commuting. My compact SUV consumes 10L/100km, while his similarly priced sedan only uses 7.5L/100km. That's an extra 200 yuan monthly on fuel - enough for two full tanks. The gap mainly comes from powertrain losses, especially when accelerating from traffic lights where the engine roars louder and burns more fuel. But during last week's heavy rain with flooded roads, my SUV's high ground clearance kept it running while sedans had to detour. So the higher fuel consumption is essentially paying for better passability. Nowadays, newly launched hybrid SUVs can narrow the gap to within 2L/100km.