Actually, the E30 318i M10 lost weight, compared to the E21 320i.
According to the 3- Series Enthusiast's Companion:
E21 320i...2500
E30 318i 1984...2360
E30 318is...2602
Also, converting to the plastic bumpers doesn't save much weight at all. I figured the weights from the ETK, and the total weight saving was 4.4 pounds:
Front aluminum = 23.73 pounds
Front plastic = 20.37 pounds
Rear aluminum = 26.55 pounds
Rear plastic = 25.51 pounds
According to the 3- Series Enthusiast's Companion:
E21 320i...2500
E30 318i 1984...2360
E30 318is...2602
Also, converting to the plastic bumpers doesn't save much weight at all. I figured the weights from the ETK, and the total weight saving was 4.4 pounds:
Front aluminum = 23.73 pounds
Front plastic = 20.37 pounds
Rear aluminum = 26.55 pounds
Rear plastic = 25.51 pounds
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