F1 chief executive Ecclestone revealed recently he is "at loggerheads" with the FIA president about the 1.6 litre, four-cylinder turbo engine plans championed by Todt.
Todt, however, said it is important to accept the change due to F1 needing to be greener.
"Already I hear about the noise, but that's evolution," he is quoted by the Sydney Morning Herald.
"Two decades ago, you had a 12-cylinder engine, now you have only 2.4 litre V8 ... I think it's very important that F1, being the pinnacle of motor racing, takes on board the evolution of society," insisted Todt.
"It will be definitely greener, with the introduction of more technologies in the future."