Translation:The microwave oven is faster than the kitchen stove.
in american english, we simply call 'cuptorul cu microunde' and 'aragazul' 'the microwave' and 'the stove', respectively.
Could you not say "the stove" instead of "the kitchen stove"? I'm not sure where else a stove would be located.
I think in the context you could easily drop the "kitchen", but other types of stoves do exist. For instance, I have a wood stove in my basement for heat in the winter.