A new report indicates the Ferrari 458 M will be unveiled next year at the Geneva Motor Show with as much as 666 bhp.

A new report indicates the Ferrari 458 M will be unveiled next year at the Geneva Motor Show with as much as 666 bhp.

Internally codenamed "142M", the Ferrari 458 Italia successor is believed to come with a twin-turbo V8 engine that will have a displacement of less than four liters in order to comply with the Chinese tax threshold which has greatly affected sales of the current model that packs a 4.5-liter V8.

The new motor will be largely based on the California T's 3.8-liter unit and according to Autocar it could be tweaked to develop 666 bhp (497 kW) which would be more than main rival McLaren 650S that has 641 bhp (478 kW). Chances are the engine will have a 12:1 compression ratio and will benefit from the company's "ion" knock detection system which can automatically adjust combustion conditions for each of the eight cylinders.

Torque is estimated to stand at more than 550 lb-ft (745 Nm) which would be 50 lb-ft (68 Nm) more than the 650S. To cope with the extra power, Ferrari's engineers will have to make some upgrades to the dual-clutch Getrag seven-speed gearbox which will likely get uprated internals and/or an additional gear.

Scheduled to debut March next year at the Geneva Motor Show, the Ferrari 458 M (name not confirmed) will adopt an evolutionary styling with an emphasis on being more aerodynamically efficient.

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Ferrari 458 M coming to Geneva Motor Show with 666 bhp twin-turbo V8