Any vehicle built will have to be zero emissions by 2040, but the Business Committee has said that should be 2032 instead.
Reacting to the group's request, Ruth Jarmin from Christian charity Operation Noah told Premier: "They're very clear what they think about the current policy.
"They call it 'vague' and 'unambitious' which is exactly the opposite of what we need considering the serious situation we're in in terms of climate change."
Ministers must also "get a grip" and tackle a lack of charging points, which is one of the main barriers to people buying electric cars, the Parliamentary Business Committee warned.
The Government has outlined a goal for an end to sales of new "conventional" petrol and diesel cars by 2040 as part of efforts to clean up transport which causes air pollution and is the worst sector for carbon emissions in the UK.
Jarmin has an electric car herself and explained why more people should buy them.
"It's lovely driving past people, waving at them, saying hello and knowing that we're not actually reducing the life expectancy by the fumes that we put into the air as we're driving along," she added.
A range of cars are beginning to replace conventional vehicles from electric models powered by a battery charged from the grid to hybrids with an engine and a small battery which charges from braking but cannot be plugged in.
The 2040 target puts the UK behind a range of countries including Norway, which is aiming for an end to combustion engine cars in 2025, and India, China, the Netherlands and Ireland with a 2030 goal and Scotland with a target of 2032.
Listen to Premier's Eno Adeogun speaking with Ruth Jarmin from Christian charity Operation Noah:
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