Red Bull head of aerodynamics Dan Fallows believes his team can overcome the deficit it has to championship leaders Mercedes on the strength of the car's aero performance... read more »

Williams announce a loss of £42.5m in 2014, blaming the deficit on a "hangover" from the team's ninth-placed finish in 2013. read more »

Mercedes will not rush bringing in upgrades for its Formula 1 engine, despite the resurgent Ferrari having dramatically reduced its power deficit, says Niki Lauda read more »

McLaren believe they'll be capable of fighting for points with both cars at the next race in three weeks time according to racing director Eric Boullier. The Woking outfit... read more »

Nico Rosberg faces a 27 point deficit heading into the European leg of the 2015 Formula 1 World Championship season after finishing third in Bahrain read more »

Williams' relatively small budget compared to Ferrari's is beginning to show according to Felipe Massa. The Brazilian believes the Grove outfit's budget deficit... read more »

Renault refuses to change its strategy in the wake of a poor start to the F1 season, but insists its problems increase its desire succeed. read more »

McLaren may still be struggling with a power deficit from the Honda power unit but the aero team are pushing on with their development path.  A new diffuser design was... read more »

Jenson Button is confident McLaren will enjoy massive gains in lap time when they're able to run their Honda power unit at 100 per cent. At present Honda are having to... read more »

Red Bull motorsport consultant Helmut Marko admits that the squad has a big deficit compared to leaders Mercedes and concedes that the situation may not change… read more »

Williams' Rob Smedley admits the deficit to Ferrari is a concern following last weekend s 2015 F1 Malaysian Grand Prix read more »

Red Bull's Helmut Marko has admitted that the team's RB11 chassis is equally to blame for their performance woes, alongside its engine partner, Renault. Marko... read more »

Valtteri Bottas says the Williams Formula 1 team is missing "quite a big amount" of race pace as it fights to remain one of the sport's frontrunners read more »

Renault Sport F1 boss Cyril Abiteboul has hit back at comments from Red Bull's Adrian Newey, accusing the design guru of lying about the Renault power unit. The Briton... read more »

Renault launches a defence of its power units after discovering the performance shortfalls were down to engine and chassis issues read more »

Felipe Massa has suggested that Williams is not on a level playing field with Mercedes in terms of engines, which he believes is helping his former Ferrari… read more »

Daniel Ricciardo has admitted that Red Bull has a significant deficit to overcome if it is to close the gap to leaders Mercedes after a difficult Australian… read more »

Red Bull has threatened to quit Formula 1 if something isn't done to equalise engine performance as well as opening up the regulations to make them less restrictive and... read more »

Red Bull boss Christian Horner has called on the FIA to rein in Mercedes' advantage over the rest of the field after admitting Renault had a 100bhp deficit to the world... read more »

Nico Rosberg insists the F1 qualifying margin between himself and Australian GP polewinner Lewis Hamilton was down to errors on his fastest lap. read more »

Renault believes the changes to its power unit this year should put Red Bull in a position to race for victories at the end of the season after it achieved its pre-season... read more »

Renault’s Remi Taffin believes that they have halved their engine efficiency deficit to Mercedes, but isn’t predicting any race wins until late in 2015. read more »

Sebastian Vettel plays down the time deficit to Mercedes on the second day of F1 testing, suggesting Ferrari will only now work on its ultimate pace read more »

Renault Sport admits they still have ground to make up to Mercedes in terms of their power unit, but they are confident they will reach their target... read more »

Cyril Abiteboul says Renault is on course to halve the PU deficit to Mercedes in time for the opening round as it enjoys a reliable test in Spain. read more »