Former F1 driver Nick Heidfeld has lamented the loss of F1's familiar scream.
Despite now racing an almost silent Formula E car, the 37-year-old former BMW and Williams driver said loud engine noise should be part of the F1 package.
"When I think of my time in Formula One," said Heidfeld, "I still hear those engines at 20,000rpm and screaming so loud you have goose bumps.
"That sound is important for Formula One," he told Frankfurter Allgemeine Zeitung, "it is part of the DNA of the series and it's a pity they don't sound like that anymore.
"Even a touring car is louder now," Heidfeld added.
The German insisted, however, that the sound of F1 and Formula E cannot be compared, just as few other aspects of the two series can.
The acceleration, the cornering forces, the braking -- none of those things can be compared with Formula One
"It (the Formula E car) weighs just under 900 kilograms and in qualifying we have 300hp and in the race about 180," he said.
"The acceleration, the cornering forces, the braking -- none of those things can be compared with Formula One," Heidfeld added.
Where Formula E can compete, he argued, is on the skill of the drivers.
"Of course," he explained, "there are many top people in F1, but some others are only there because they bring enough money.
"It's not like that with us. In Formula E, the drivers are there because they drive well," said Heidfeld.
Looking back to his own more than decade-long Grand Prix career, he said his favourite car was the title-winning McLaren of 1998.
Loved the McLaren
"I was the test driver and the car was stunning," said Heidfeld. "It was so wonderfully balanced, it had so much power. I immediately had the feeling of being at one with the machine."
Despite his undoubted talent, more than 180 race starts and 13 podiums, however, Heidfeld never won in F1, and he admits that he looks back on his career with some regret.
"Yes," he admitted, "especially shortly after it finished it was extremely difficult for me.
"I left Lotus in the middle of the 2011 season and I didn't see it coming and was not prepared in my last race that my career was over.
"It was hard and it took time to get over it, but I think I grew stronger as a result," said Heidfeld.