Adrian Newey has gone public with an unusually pointed message to his own engine partner, calling for what he described as a "very large step in combustion engine power" from Honda ahead of the 2027 season.
The statement, reported through a detailed paddock analysis segment, is being interpreted by rival engineers as one of the most direct admissions yet that Honda's rebuilt 2026 power unit has fallen well behind the Mercedes benchmark — and that no amount of chassis brilliance from Newey can close the gap alone.
Honda's predicament is rooted in its 2021 withdrawal from the sport, when the manufacturer lost the bulk of its championship-winning engineering workforce. According to the analysis, the rebuilt Sakura power unit team has effectively been starting from scratch, and the consequences have been severe. Vibrations from the new Japanese V6 are reportedly so aggressive that they are damaging battery systems and limiting Fernando Alonso to roughly 25 consecutive laps before the Spaniard risks nerve damage to his hands.
That is a remarkable claim about a factory power unit at this stage of the season. And it explains why Newey — normally a reserved presence in technical discussions — has chosen to put Honda's problem on the record rather than keeping it behind closed doors.
The request for a "very large step" is not ambiguous. In F1 engine language, incremental development is measured in fractions of a per cent; a "large step" signals a ground-up redesign of combustion architecture, likely involving pre-chamber ignition, revised bore and stroke ratios, or a rethink of the turbo-compound integration. None of those are overnight projects, and none of them can be delivered mid-season under current freeze rules.
Some in the paddock read Newey's intervention as calculated. By making the plea publicly now, he establishes a clear record that the chassis side of Aston Martin has done its job — and that any failure to challenge at the front in 2027 lies with the combustion team in Japan. That may be uncomfortable for Honda, but it sharpens the accountability inside a partnership still finding its rhythm.
The context matters. Aston Martin's underlying chassis work this year has drawn quiet admiration from rival engineers, with multiple teams reportedly studying the AMR26 for its suspension geometry and sidepod packaging. If the engine matched the chassis, Newey's side of the garage would already be fighting for podiums. Instead, Alonso and Lance Stroll are managing stints, nursing deployment issues, and watching the Mercedes-powered cars disappear on the straights.
Honda has not yet responded publicly to Newey's call, and team principal Andy Cowell — himself a former Mercedes powertrain chief — has been careful to keep internal criticism measured. But the pressure is now out in the open. With the 2027 regulations already locked, Honda's next engine is effectively the one that must justify the entire Aston Martin project.
For a designer with Newey's track record, flagging an engine deficit this publicly is not an impulsive move. It is a message sent as much to Honda's boardroom in Tokyo as to the rest of the grid: the chassis is ready. The engine has to catch up.
Source: youtube.com