What is the difference between BMW 118i and 120i?

[BradyAnn]

Here are the differences between BMW 118i and 120i: 1. Number of cylinders and displacement: The 118i has 3 cylinders with a displacement of 1499ml, supporting turbocharging. The 120i has 4 cylinders with a displacement of 1998ml, also supporting turbocharging. 2. Maximum speed: The 118i has a top speed of 220km/h. The 120i has a top speed of 225km/h. 3. Acceleration: The 118i takes 8.7s to reach 100km/h. The 120i takes 7.2s to reach 100km/h. 4. Output power and rotation speed: The 118i produces 100(kW/rpm)/4400 (revolutions per minute). The 120i produces 135(kW/rpm)/5000 (revolutions per minute). 5. Combined fuel consumption: The 118i consumes 5.5 liters/100km. The 120i consumes 5.9 liters/100km.

[MarcusMarie]

I was often asked this question when I worked at a 4S dealership. The BMW 118i and 120i look quite similar in appearance, but they feel noticeably different when driven. The 120i is equipped with a 2.0T high-power engine, delivering nearly 50 more horsepower than the 118i, making acceleration and overtaking much sharper. The suspension tuning is also more sporty, providing significantly better grip during high-speed cornering. In terms of features, the 120i comes with additional amenities like automatic parking and a heads-up display, along with larger wheels by an inch. Fuel consumption is actually quite similar, with only a slight increase of a few dozen yuan per month in fuel costs. If you ask me, if the budget allows, go straight for the 120i. Power is like savings—you might not need it often, but it can be a lifesaver in critical moments.

[VonNathan]

Last year I researched both when helping my younger brother choose a car. There's a price difference of 30,000-40,000 yuan between the 118i and 120i, but the daily driving experience differs significantly. The 118i is sufficient for city driving, with brisk acceleration and good fuel efficiency. However, the 120i has stronger high-speed performance - overtaking trucks requires just a tap of the accelerator. The 120i's seats offer better support, making long drives less tiring. The upgraded Harman Kardon sound system delivers punchier bass. There are also differences in detail configurations like rear air vents. For young people who frequently take long trips or love road trips, spending extra on the 120i is absolutely worthwhile since you'll be driving it for several years.

[DelBeckett]

As a long-time BMW owner, I can say the 118i and 120i are essentially differentiated by tuning - both use a 2.0T engine but with different power outputs. The 118i delivers 136hp max, while the 120i upgrades to 178hp. The 120i's transmission responds quicker, with more assertive gear shifts in Sport mode. Though sharing identical body rigidity, their steering feels differ - the 120i's wheel is heavier and more precise. Fuel consumption gap is about 0.5L/100km higher for the 120i. In the used car market, the 120i also holds better residual value. Don't be fooled by the seemingly small spec differences - they deliver completely distinct driving experiences. The 118i is perfectly fine for tight budgets, but for true driving pleasure, the 120i is a must.

[MacAdalynn]

When chatting with BMW owners while picking up kids, I learned a lot. The 118i and 120i share the same chassis structure, but the 120i has wider tires for better grip. The power difference is most noticeable when fully loaded—the 120i doesn’t struggle with air conditioning on while climbing hills. The main configuration differences lie in comfort: the 120i adds thigh support adjustment and seat heating, which is especially practical in winter. The dashboard also displays more information. Externally, only the wheel sizes differ; otherwise, they’re nearly identical. For family use, the 118i is sufficient, but if you frequently travel with the whole family or live in mountainous areas, spending an extra 20,000 for the 120i offers more peace of mind.

[EvaMarie]

I've rented and driven both models. The 118i is great for city commuting—agile, fuel-efficient, and easy to park. But the 120i's power reserve is like smartphone storage: seems excessive but gives peace of mind. The 120i feels more confident during highway lane changes and overtaking, never sluggish even with full load and AC on. Its engine note is tuned deeper, with audible pops on hard acceleration. The larger wheels look more proportionate and surprisingly reduce road noise. Additional features include keyless entry and steering wheel paddle shifters. For young buyers' first car, the 118i offers better value, but the 120i delivers more driving thrill. The extra horsepower is like buying shoes half size up—never feels tight.