Nearly two million 1 Series models have been sold since the introduction of the first 1 Series generation ten years ago.
This latest incarnation builds on the winning formula of these three- and five-door predecessors with new power units from the latest BMW engine family, additional EfficientDynamics technologies fitted as standard, and careful enhancements to the exterior and interior design.
The level of standard equipment is now even higher, new options have been added and with new mobility services from BMW ConnectedDrive, there are even more ways to increase the functionality and personalisation of the new 1 Series.
The BMW 118i and BMW 120i are both powered by a 1.6-litre four-cylinder engine. It develops 136hp and 170hp respectively, offering acceleration as low as 7.2 seconds to 62mph in the 120i and with fuel consumption and CO2 emissions of just 52.3mpg and 125g/km in the 118i.
The four-cylinder engine in the 125i features a 2.0-litre displacement, providing 218hp and peak torque of 310Nm, enabling a 0-62mph time of just 6.2 seconds.
At the top of the petrol engine range remains the formidable M135i with its turbocharged straight-six engine.
Both the new-generation three-cylinder and latest four-cylinder engines are based on the same efficiency-led concept, and boast new turbocharging technology and further developed common rail direct injection systems.
The new BMW 1 Series is on sale 28 March, 2015 priced at £20,245 OTR for a three-door 118i SE and £20,775 OTR for a five-door 118i SE.