Franz Tost has laid down a marker to his two Toro Rosso drivers, saying that they must reach the final part of qualifying in Japan. read more »

Honda will run dyno tests on their new spec engine before making the call on whether to race it in Japan. read more »

Honda's upgraded power unit has edged it ahead of Renault's current spec, according to Toro Rosso's Franz Tost. read more »

Honda confirms it will revert to its B-spec Formula 1 power unit for the remainder of the Russian Grand Prix race weekend. read more »

Pierre Gasly and Brendon Hartley will run Honda's older specification engine from FP3 onward after the Japanese manufacturer declared there is "still some work to... read more »

Honda has reverted to its previous specification of Formula 1 engine despite a positive response to the upgrade in Russian Grand Prix practice read more »

Red Bull knew they would have to revert back to a B-spec engine at some point when they took the new C-spec unit, as the update cannot currently run at high altitude circuits. read more »

Max Verstappen says Red Bull had to use an older Renault Formula 1 engine for the Russian Grand Prix, because the spec C powerunit cannot run in upcoming high-altitude races read more »

Red Bull always knew it would have to revert to Renault's B-spec engine even before Verstappen's Singapore issue. read more »

Honda have confirmed that Pierre Gasly and Brendon Hartley will be running Spec-3 engines in Russia, while grid penalties for Red Bull are set to be confirmed on Friday. read more »

Red Bull drivers Max Verstappen and Daniel Ricciardo are braced for grid penalties at the Russian GP as the team revert to Renault's 'B-spec' engine. read more »

Daniel Ricciardo says the progress Renault has showed with its spec C Formula 1 engine has given him more confidence about his move to the manufacturer for 2019 read more »

The Autosport team discusses the prospect of Red Bull taking grid penalties at the Russian Grand Prix to give it access to a fresh Renault engine - but using the previous... read more »

Renault Formula 1 boss Cyril Abiteboul says Max Verstappen's second place in the Singapore Grand Prix was vindication for its "not perfect" Spec C engine read more »

Facing an engine penalty for the upcoming Russian Grand Prix, Red Bull are contemplating putting Max Verstappen back on the Renault B-spec engine. read more »

Red Bull is bracing itself to take engine grid penalties at the Russian Grand Prix, as it considers a surprise move back to a spec B Renault read more »

Carlos Sainz reckons in Renault's C-spec engine they have the baseline for a power unit that will can be "at the level of Mercedes and Ferrari." read more »

Carlos Sainz Jr believes Renault will "finally make an engine at the level of Mercedes and Ferrari" next season after its latest Formula 1 upgrade made its debut in... read more »

Fernando Alonso has completed his first test in the new-for-2018 spec IndyCar, but his plans for next year still aren't confirmed. Glenn Freeman is joined by... read more »

Fernando Alonso completed a "good day" behind the wheel of a current-spec IndyCar at the Barber Motorsports Park on Wednesday. read more »

Despite a new C-spec engine upgrade in Monza, Red Bull believe the improved Renault engine is still much slower than Ferrari and Mercedes. read more »

Max Verstappen says Renault's Spec C Formula 1 engine is still missing "over a second" to Mercedes and Ferrari at the Italian Grand Prix, despite providing a... read more »

Max Verstappen is onto his third and final penalty-free engine after Red Bull opted to put the new spec Renault power unit in his RB14. read more »

Christian Horner says Renault's new Spec C Formula 1 engine has delivered as predicted and will run in both Red Bulls for the rest of the Italian Grand Prix read more »

Daniel Ricciardo has said that the new Renault C-spec engine in the back of his Red Bull showed "positive signs" on Friday at Monza. read more »