As long as they are both of the type specified for the engine it should be fine, although there will be some differences in firing time, they are so small to not be noticed.
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Alfa Romeo is a car
Alfa Romeo was created on 1910-06-24.
Alfa Romeo is made in Italy.
Alfa Romeo is Italian.
Alfa Romeo makes their own cars.
Alfa Romeo GT was created in 2003.
Alfa Romeo Arna was created in 1983.
Alfa Romeo MiTo was created in 2008.
Alfa Romeo Giulia was created in 1962.
Alfa Romeo Alfasud was created in 1971.
Alfa Romeo RM was created in 1923.