Answer : A Porpoise is faster than a Groundhog
The average top speed of a Porpoise is 23 kph, (14 mph) and for a Groundhog it is 8 kph, (5 mph)
 
| Name | Name:Porpoise | Name:Groundhog | 
| Top Speed | Top Speed:23 kph, (14 mph) | Top Speed:8 kph, (5 mph) | 
|  | * slow swimmer |  | 
| Height | Height:n/a | Height:50 cm, (1 ft, 7.7 in ) | 
| Weight | Weight:53 kg, (117 lbs) | Weight:2 kg, (4 lbs) | 
| Lifespan in Wild (years) | Lifespan in Wild (years):15 | Lifespan in Wild (years):4 | 
| Description | Description:Harbor Porpoise are among the smallest cetaceans in the ocean. It has small flippers and lives inshore, so is the best-studied of the cetaceans. Their loud puffing sounds make them easy to find. | Description:Groundhogs are fairly large for rodents, and they are best known for hibernating throughout the winter and predicting spring. They are brown and are members of the squirrel family. | 
|  |  |  |