'Thanks to you, I have had an amazing engine,' the Spaniard told some 250 employees at the factory near Paris.
Renault manager Flavio Briatore is confident the 25-year-old Finn has what it takes to triumph in Formula One.
Red Bull's triple world champion Max Verstappen followed up a Saturday sprint win with a statement pole position for Sunday's Austrian Grand Prix, with McLaren's Lando Norris again alongside on the front row.
World champion Max Verstappen took the first pole position of the Formula One season in Bahrain on Friday.
Fernando Alonso improved his chances of claiming a third Formula One world title by storming to pole position for the Singapore Grand Prix on Saturday.
Improving qualifying, without upsetting the race pace, will be the immediate priority for Ferrari whose last driver's title was with Kimi Raikkonen in 2007 and who last enjoyed constructors' success a year later.
Formula One world champion Fernando Alonso is confident he can stop Michael Schumacher's winning run in his Ferrari rival's home German Grand Prix this weekend.
Michael Schumacher has won seven times at Magny-Cours, and can become the first driver to win the same Grand Prix eight times.
McLaren's Lewis Hamilton added the Italian Grand Prix to his list of Formula One victories on Sunday while Ferrari's Fernando Alonso stretched his overall championship lead to 37 points with third place.
As impressive as those results have been, Red Bull team principal Christian Horner took the opportunity after the race to issue a scary warning that his team is capable of winning every grand prix this season.
Mexican team mate Sergio Perez qualified second fastest in a front row lockout for Red Bull, 15 years after the team took their first win at the Shanghai International Circuit with Sebastian Vettel.
This year could be far more of a struggle for the 26-year-old Spaniard now that he is back at Renault.
Formula One will have a record 24 races in the season that starts in Bahrain on Saturday.
Fernando Alonso said allegations that his Renault team staged an accident to help the double Formula One world champion win last year's Singapore Grand Prix had surprised him as much as anyone. 'It is difficult to understand all this situation, all these investigations,' the Spaniard told reporters at the Italian Grand Prix on Thursday.
Winner of two Formula One championships in Brazil, Ferrari's Fernando Alonso says he feels less pressure and has nothing to lose as he chases another in Sunday's title-decider at Interlagos.
Ferrari's Formula One championship leader Fernando Alonso and McLaren's Lewis Hamilton crashed out of the Belgian Grand Prix at the start on Sunday.
Fernando Alonso hopes to extend his Ferrari contract beyond the end of 2016 and reckons he could have 10 more years of racing in Formula One.
Spanish midfielder Xabi Alonso, who knew that his time at Liverpool was up a year ago, has now revealed the full details behind a dramatic 28 million pounds Anfield exit.
World champion Sebastian Vettel won the Korean Grand Prix in a Red Bull one-two finish on Sunday to take the overall Formula One lead from Ferrari's Fernando Alonso with four races remaining.
Fernando Alonso led from pole position to chequered flag to win the German Grand Prix for Ferrari on Sunday while Germany's World champion Sebastian Vettel was stripped of second place for an overtaking infringement.
Fernando Alonso believes this year's world title race ended when stewards decided not to punish McLaren team mate Lewis Hamilton.
Ferrari boss Stefano Domenicali says he is confident the team's former hero Michael Schumacher will be beaten by their new idol Fernando Alonso.
Images from the inaugural Korean F1 Grand Prix held at the Yeongam International Circuit on Sunday.
Ferrari's Fernando Alonso won a rain-hit and chaotic Korean Grand Prix to seize the Formula One championship lead on Sunday after both his Red Bull rivals failed to finish.
Fernando Alonso reiterated his long-term love and loyalty to Ferrari on Friday after McLaren, the Formula One team he left in acrimonious circumstances in 2007, said they would be keen to sign him.
Ferrari will still win the Formula One championship despite failing to score any points in Britain at the weekend, according to their double world champion Fernando Alonso.
A huge party began in Fernando Alonso's home town of Oviedo on Sunday when the Spanish driver became the country's first F1 champion.
Renault's Fernando Alonso made his peace with future Ferrari team mate Felipe Massa on Friday before setting the pace in free practice for the Brazilian Grand Prix at Interlagos. While the Spaniard lapped with a best time of one minute 12.314 seconds, Brazilian Rubens Barrichello was the fastest of the three championship contenders ahead of what could be a title-deciding race on Sunday.
Fernando Alonso has backed Robert Kubica to replace him at Renault after the double Formula One world champion joins Ferrari at the end of the season.
Ferrari have made a remarkable recovery after a slow start to the season but still have a gap to close on their rivals, Formula One championship leader Fernando Alonso said on Thursday.
Ferrari's Fernando Alonso will aim to consolidate his Formula One championship lead around the streets of Singapore on Sunday, seeking a third win in the night race to extend his 37-point advantage in the standings.
Twice Formula One world champion Fernando Alonso made his first public appearance with his new Ferrari team at an event in Valencia, Spain on Sunday.
Renault's world champion Fernando Alonso has been elected as a director of the Grand Prix Drivers' Association in place of retiring Ferrari rival Michael Schumacher.
Ferrari's Fernando Alonso emerged as a possible surprise candidate for the vacant Red Bull seat on Sunday after the Formula One world champions refused to rule him out.
McLaren's Fernando Alonso has been cleared to travel to Malaysia.
Spain's double World champion Fernando Alonso and Britain's Jenson Button will drive for McLaren next season, the Formula One team announced on Thursday.
Raja Sen's trackside analysis of the first practice session at the Buddh Internationa Circuit.
Formula One driver Fernando Alonso has stepped in to save Spanish cycling team Euskaltel-Euskadi from folding at the end of the season, sponsors said on Monday.
