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The primary difference between the V7 and V8 is suction power and battery life. The Dyson V8's more powerful motor can generate 115 AW of suction, while the V7 generates 100 AW of suction. Additionally, the V8 can run for up to 40 minutes compared to the V7, which runs for 30 minutes.
Sorry, there was a problem. Please try again later.Hi Leah, this is Kelly with Dyson. Dyson V7 vacuums have up to 30 minutes of run time, and 100 air watts of suction power. V8's have up to 40 minutes of run time and 115 air watts of suction power. Best wishes, Kelly Dyson Customer Support
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