| Answer | Crossword Clue |
|---|---|
| PURR | Fine-tuned-engine sound |
| PURR | Sound of a fine-tuned engine |
| PURR | Well-tuned engine sound |
| PURR | Sound of a tuned engine |
| PURR | Sound of a well-tuned engine |
| HUM | Sound of a well-tuned engine |
| PURR | Sound like a well-tuned engine |
| PURR | Sound of a well-tuned engine. |
| PURR | Sound of a finely tuned engine |
