Subaru hopes that a new range of vehicles based on the new platform will mark a turning point. This will be first be used on the all-new XV small SUV, which goes on sale in Europe early next year, followed by the all-new Impreza and upcoming next-generation Forester. There’s no news on whether Europe will get the giant seven-seat Subaru Ascent SUV that's due later next year.
According to Atsushi Nakashima, one of the company’s most senior body design engineers, the Global Platform will deliver ‘premium-level’ refinement in a number of important areas including straight-line stability - reducing the need for tiring steering corrections during high-speed driving - and big reductions in vibration through the steering wheel and floor.
The platform has been designed to be compatible with crash standards as far ahead as 2025. US versions of the Impreza structure already get a specially engineered B-pillar with a wall thickness of between 1.4mm and 2.75mm along its length to help better protect occupants.
Subaru XV to go on sale in 2018
At a technical presentation in Belgium, Subaru showed a video of the new Impreza being struck head-on by a 2.5-tonne trolley at 56mph. The car's boxer engine slides away under the floorpan rather than impacting on the passenger space, and the front structure is substantially crushed against the bulkhead, but the front doors are hardly impacted and could still be opened.
Subaru has also just announced that it has opened a new test track facility in Hokkaido, the northernmost island of Japan. This will be used to develop ‘driver assist technologies’.
Technical highlights of the new structure
The new Global Platform has been dramatically improved by the use of six structural box-sections running under the floorpan, up from four in the outgoing platform. The front suspension towers are now also braced against the lower A-pillar and bulkhead and adhesives used in addition to spot welding.
Subaru claims a big improvement in platform stiffness. Torsional rigidity is up by 70%, front suspension rigidity by 70%, front body lateral rigidity by 90% and rear subframe rigidity by 100%. Tuning of the ride aims to be ‘comfortable but firm’.
The improved front-end rigidity is such that Subaru claims that, thanks to a reduction of body flex, turn-in response of the vehicle is improved by 0.1sec, which is noticeable to the driver. The new architecture is also said to be able to absorb 40% more energy from an impact.