To answer you're question in all honesty, yes. Dock Ock has already been more than generous with an answer, but I figure I'll chime in as well.
- in Spider-Man, Peter held the kids' tram car by ONE HAND,
WITHOUT THE SYMBIOTE
- in Spider-Man 2, as DocOck said, Peter stopped an entire train at full speed,
WITHOUT THE SYMBIOTE
- in Spider-Man 2, Peter held up an entire wall from the collapsing building in order to save Mary Jane from being crushed,
WITHOUT THE SYMBIOTE
- in Spider-Man 3,
WITH THE SYMBIOTE, he pulled the entire sewer grate from the ground with cement still attached to it, with little effort
So to answer your question again, yes.
BTW how do we know Venom did it? For all we know, Sandman sent the cars flying into the air where Venom webbed them up.