A six-cylinder engine, which offers smoothness and higher power, was formerly the distinguishing feature of the ultimate hot BMW 135i.

There is still a straight-six option for the BMW 135i-series hatchback, which is sold all over the world but not in the United States.

Although an eight-speed automatic transmission in BMW 135i and all-wheel drive are options for the M135i,

As a near relative of the 2-series coupe, the BMW 135i-series is built on a rear-wheel-drive platform with engines that are longitudinally positioned.

The chassis is carried over from the BMW 135i 2-series and is equipped with a five-link rear axle and an aluminium, double-pivot, damper-strut front suspension.

The 225/40 front and 245/35 rear tyres on the M135i are mounted to 18-inch wheels. The 225/40 front and 245/35 rear tyres on the M135i are mounted to 18-inch wheels.

The BMW 135i feels incredibly nimble because the electromechanical power steering is set to be substantially lighter than on larger BMW models like the 5- and 6-series.

The BMW 135i enjoys rotating due to its relatively small wheelbase, yet it is forgiving and simple to drive.

It's odd that disabling the stability control system immediately switches the vehicle to Comfort mode, but that's okay:

The N55 3.0 litre turbocharged straight-six is a good engine; it sounds great and has no issue accelerating the BMW 135i quickly.

According to BMW, the acceleration from 0 to 60 mph takes less than five seconds; the highest speed is limited to 155 mph. It's sheer delight to drive this small hatchback on country roads.

Passing movements are handled with ease, the engine sings a beautiful but artificially boosted melody, and the shifter gives adorably brief throws.

The performance shifter for the M135i debuted with a recent update that also saw an increase in engine horsepower from 315 to 322.

Even with all of its sporting attributes, the M135i makes a great long-distance cruiser. It has a variety of driving modes and can be a very well-behaved compact.

The BMW 135i 1-series is a shining illustration of what the future holds because it has a SIM card installed and can instantly receive system upgrades from BMW online, much like a Tesla.