2015 BMW 428i Gran Coupe: MPG and fuel economy
The 2015 BMW 428i Gran Coupe is rated by the U.S. Environmental Protection Agency at 26 combined MPG, with 23 MPG in the city and 33 MPG on the highway. That sits a little below the average car in the Compact Cars class for the same model year.
This page collects every fuel-economy figure the EPA publishes for the 2015 BMW 428i Gran Coupe. Below you will find the headline combined, city, and highway MPG, the estimated annual fuel cost at three different driving levels, the tailpipe CO₂ emissions, and a full breakdown of the engine and drivetrain. If you want to know whether this generation got more or less efficient over the years, the year-over-year table further down covers every model year the EPA has rated.
Key takeaways
- The most efficient car in the Compact Cars class for the 2015 model year is the Volkswagen e-Golf at 116 MPG.
- EPA estimates this car costs around $2,500 more in fuel over five years than an average new vehicle of the same model year.
- Requires premium gasoline, which typically adds about 40 to 60 cents per gallon to the EPA's annual fuel cost estimate.
Fuel economy at a glance
These are the EPA's official ratings for the 2015 BMW 428i Gran Coupe. The numbers come from a standardised laboratory test cycle and are the same figures that appear on the window sticker of every new car. Real-world mileage varies with driving style, weather, fuel quality, and how heavily loaded the car is.
Combined MPG is a 55/45 weighted blend of the city and highway test cycles. The EPA uses it as the single number you can compare across the entire dataset, including hybrids and EVs (which use the equivalent MPGe figure).
| Combined MPG | 26 MPG |
| City MPG | 23 MPG |
| Highway MPG | 33 MPG |
| Annual fuel cost | $2,650 |
| Tailpipe CO₂ | 338 g/mi |
| Fuel type | Premium |
How the 2015 BMW 428i Gran Coupe compares
The 2015 BMW 428i Gran Coupe returns 26 combined MPG. Cars in the Compact Cars class for the same model year average 27.7 MPG, which puts this car behind the class average by about 6%.
The most efficient car in the Compact Cars class for the 2015 model year is the Volkswagen e-Golf at 116 MPG. The bar chart below puts the BMW 428i Gran Coupe alongside the class best and the class average so you can see the full picture.
For broader context, the average new car of the 2015 model year (across all classes) returns 24.6 MPG. Larger vehicles pull the all-cars average down, so do not use that figure on its own to judge a small car or a hybrid. The full list of the most efficient cars of the 2015 model year is on its own page.
Annual fuel cost across driving patterns
The headline annual fuel cost the EPA publishes assumes 15,000 miles of driving per year and a fuel mix of 55% city and 45% highway. The dollar figure is calculated using the EPA's current reference price for premium gasoline, which is $4.61/gallon. EPA updates that reference periodically rather than tracking live pump prices, so treat it as a window-sticker estimate rather than today's pump number.
The table below scales the EPA's number to three common driving patterns. The combined MPG and the reference fuel price stay constant, only the annual mileage changes. To get a current-prices estimate, take your local gas price and multiply by 576.9 gallons (the car's annual consumption at the rated MPG).
| Driving pattern | Estimated annual fuel cost |
|---|---|
| Light driver, 7,500 miles per year | $1,325 |
| Average driver, 15,000 miles per year | $2,650 |
| Heavy driver, 25,000 miles per year | $4,417 |
Year-over-year MPG for the BMW 428i Gran Coupe
The EPA has rated the BMW 428i Gran Coupe across 2 model years, from 2015 BMW 428i Gran Coupe through 2016 BMW 428i Gran Coupe. The numbers below are the best combined MPG figure the EPA published for each year, which lets you see when the car was at its most efficient and how recent generations stack up.
Combined MPG has stayed in roughly the same range across the run, hovering close to 27 MPG.
| Year | Combined MPG | Open year page |
|---|---|---|
| 2016 | 27 MPG | 2016 BMW 428i Gran Coupe |
| 2015 | 26 MPG | this page |
Compare against other Compact Cars for 2015
If you are cross-shopping the 2015 BMW 428i Gran Coupe, the most useful comparison is against the other cars in the Compact Cars class for the same model year. The list below shows the highest-MPG peers, ranked from most to least efficient. Click any of them to open its full page.
The Volkswagen e-Golf leads this group at 116 MPG, 90 MPG ahead of the 2015 BMW 428i Gran Coupe.
Specifications
The 2015 BMW 428i Gran Coupe runs a 2-liter 4-cylinder turbocharged engine paired with a automatic (s8), sending power through rear-wheel drive.
Engine, transmission, and drivetrain together drive most of the variation in fuel economy across trims. A larger engine moves the car with less effort but burns more fuel. A turbo lets a small engine punch above its weight, often without much MPG penalty. All-wheel drive adds traction and weight, and usually costs a couple of MPG compared with two-wheel drive of the same engine.
- Vehicle class
- Compact Cars
- Engine
- 2L 4-cylinder turbocharged
- Transmission
- Automatic (S8)
- Drivetrain
- Rear-Wheel Drive
- Fuel type
- Premium
- Annual petroleum use
- 11.4 barrels per year
- Start-stop system
- Yes
Common questions about the 2015 BMW 428i Gran Coupe
Quick answers to the questions people most often search for when looking up the 2015 BMW 428i Gran Coupe.
-
Is the 2015 BMW 428i Gran Coupe fuel efficient?
It is in line with the rest of the class. The 2015 BMW 428i Gran Coupe returns 26 combined MPG, and the average car in the Compact Cars class for the same model year sits at 27.7 MPG. -
What MPG does the 2015 BMW 428i Gran Coupe get?
The EPA rates the 2015 BMW 428i Gran Coupe at 26 combined MPG, 23 MPG in city driving, and 33 MPG on the highway. Real-world numbers depend on your driving style, the weather, and how loaded the car is. -
How much does it cost to fuel a 2015 BMW 428i Gran Coupe per year?
The EPA estimates an annual fuel cost of $2,650 for the 2015 BMW 428i Gran Coupe. That figure assumes 15,000 miles of driving per year, a 55% city and 45% highway split, and the EPA's published average fuel price for the rated fuel grade. -
Does the 2015 BMW 428i Gran Coupe require premium gas?
Yes. The EPA lists the 2015 BMW 428i Gran Coupe as requiring premium gasoline. Running it on regular can reduce performance and may affect engine warranties, so it is not a recommended way to save at the pump. -
How much CO₂ does the 2015 BMW 428i Gran Coupe emit?
Tailpipe CO₂ emissions are 338 g/mi. Multiplied across a typical year of driving (15,000 miles) that works out to about 5,070 kilograms of CO₂. -
What is the difference between the city and highway MPG of the 2015 BMW 428i Gran Coupe?
City driving returns 23 MPG and highway driving returns 33 MPG, a gap of 10 MPG. A spread that wide is typical of cars with conventional automatic or manual transmissions, where stop-start city traffic eats more fuel than a steady highway cruise. -
What engine is in the 2015 BMW 428i Gran Coupe?
The 2015 BMW 428i Gran Coupe has a 2-liter 4-cylinder turbocharged engine (EPA description: SIDI). Smaller turbocharged engines like this one tend to deliver bigger-engine power on demand while keeping fuel economy closer to a non-turbo version of the same displacement. -
What transmission and drivetrain does the 2015 BMW 428i Gran Coupe have?
The 2015 BMW 428i Gran Coupe comes with a automatic (s8) transmission and rear-wheel drive. -
How does the 2015 BMW 428i Gran Coupe compare to the best car in its class?
The most efficient car in the Compact Cars class for the 2015 model year is the Volkswagen e-Golf at 116 combined MPG. The BMW 428i Gran Coupe returns 26 MPG, a gap of 90 MPG. If you are comparing on fuel economy alone, the class leader is worth a look. -
How much more does the 2015 BMW 428i Gran Coupe cost in fuel compared to an average car?
The EPA estimates that over five years, the 2015 BMW 428i Gran Coupe will cost about $2,500 more in fuel than an average new vehicle of the same model year. The difference accumulates because the car uses more fuel per mile, not because of any one-off charge at the dealership.
Source: U.S. EPA fuel economy dataset. Annual fuel cost figures assume 15,000 miles of driving per year and a 55% city, 45% highway split. Real-world mileage varies with driving conditions, vehicle maintenance, fuel quality, and driver behaviour.