Tough new Victorian laws, which could see criminals locked up for two decades for ramming a police car, have been criticised as a "symbolic" effort that will do little to reduce crime.

Anyone who injures police, paramedics and other emergency workers in a ramming will face a mandatory minimum two-year jail term under proposed laws, announced on Wednesday.

There has been a spate of police cars rammed in recent months. Credit:Paul Rovere

Those who intentionally put emergency workers at risk by driving will face a maximum 20-year jail sentence, while a new offence of recklessly exposing an emergency worker to risk by driving will carry a 10-year maximum.

The proposed laws, introduced after an almost threefold increase in cars being used as weapons, will apply even if an officer isn't injured.