OK, they have flat('ish) torque... with load, electric motors will generate an almost fixed amount of torque depending on the current being fed into it ... so, it depends if the manufacturer will vary the current being fed into the motor to control the power output...

as for petrol combustion... it requires the right amount of air fuel mixture to produce or in other words maximize the fuel being fed into the combustion chamber...  dumping an equal amount of spray into the combustion chamber at 1,000rpm does not mean it will produce torque equivalent when the same is done at 3,000rpm simply because the combustion chamber does not have that much vacuum to suck in that much air at that point and full combustion of the petrol spray does not occur...

hence, the torque should be flatter than a petrol engine in comparison...