Renault will show a greater performance at this weekend's Spanish Grand Prix, according to their head of track operations Remi Taffin.
Renault is recovering from a dismal pre-season showing and Taffin says that the French company heads to Spain lifted by recent improvements.
"The Spanish Grand Prix will be the second stage of the performance evolutions we kick-started in China," he said. "While there are not many visible hardware upgrades, there are significant improvements to the software that should further enhance driveability and therefore overall performance.
"Yet again we have also moved forward in energy management and efficiency so we are hopeful our upward trend will continue in Barcelona."
Taffin says that this weekend's race will show that the 'engine race' will be closer than it has been so far in 2014.
"The circuit itself is one of the medium demand tracks," he said. "Despite not visiting the track this year in testing it is primarily straightforward to prepare and we don’t expect any surprises.
"With three weeks between China and Spain we’ve made a huge amount of progress and in fact this race may well show that the ‘engine race’ is a lot closer since it is much more representative of the average characteristics of the majority of tracks in the next part of the season."