If you've not been around the BMW range for a while, you could be forgiven for thinking the 2017 BMW 4 Series was an entirely new model to the BMW family. Well, in a way it is fairly new, but in another way it isn't. You see, whereas the 3 Series used to come in sedan and coupe form, it's now a sedan-only model and the coupes have been redesignated as the 4 Series. When this first came about a couple of years ago it really was as simple as that. However, over time, the 4 and 5 series are likely to become more individual from each other in a similar way to how the 5 and 6 Series have diverged.
For the new model year, the 2017 BMW 4-series follows the lead of the 2-series and 3-series Gran Turismo cars by giving us all-new engines with more power and torque, and the model names have also changed as a result. What used to be the 428i is now the 430i, and what was previously referred to as the 435i is now the 440i. But if you think that means a 3.0-liter engine in the 430i and a 4.0-liter unit in the 440i, then think again. The only way those nomenclatures refer to the engines is that one is bigger than the other.
Now that's been cleared up, let's get down to some detail. The engine in 430i models is a turbocharged 2.0-liter inline-four that develops a very healthy 248 horsepower and 258 lb.-ft. of torque. The power can be sent to the rear or all four wheels through a six-speed manual or eight-speed automatic transmission. The 2017 BMW 4 Series 440i offers a genuine alternative to the inline-four in the 430i as this time it's a turbocharged inline-six instead. This 3.0-liter unit puts out a considerably more powerful 320 horsepower and 330 lb.-ft. of torque, which is 20 horsepower and 30 lb.-ft. more than the six-cylinder in last year's 435i.
What those numbers translate to in terms of performance is a car that more than lives up to the promises made by its sleek and sporty styling. The 2.0-liter engine gets to 60 mph from a standing start in just 5.5 seconds, while its 3.0-liter bigger brother manages it in an even more impressive 4.8 seconds.
Another of the many plus-points of the new 4 Series is the impressive fuel economy it delivers as well as all that power and performance. The 430i with the eight-speed automatic and rear-wheel drive gets EPA-estimated figures of 23 mpg in the city, 34 mpg on the highway and 27 mpg combined.*
The 2017 BMW 4 Series is still available in three different body types, which are the two-door Coupe, the four-door Gran Coupe and the two-door Convertible. Rear-wheel drive is standard across the lineup, although BMW's excellent xDrive all-wheel drive system is also available.
*All vehicle mileage based on 2017 EPA mileage estimates. Use for comparison purposes only. Do not compare to models before 2008. Your actual mileage will vary, depending on how you drive and maintain your vehicle.