Perseverance might weigh less on Mars than it does on Earth, but the rover is still hefty and heavier than its predecessors.
In terms of size and weight, Curiosity is quite similar to Perseverance, but packs more scientific instruments onboard. Both rovers also have the same top speed of around 0.09 miles per hour.
They were significantly smaller and lighter than both Curiosity and Perseverance, weighing in at just 384 pounds each. Spirit and Opportunity are now inactive but far exceeded their projected mission length. NASA had planned for them to last just 90 days, but Spirit lasted more than six years and Opportunity went on for 15 years before it was engulfed in a Martian sandstorm.
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