Best Car Dealership Websites in Portsmouth, NH
9 dealership websites in Portsmouth, ranked by how fast and stable they are for real shoppers. Portsmouth averages 83, 3 points above the New Hampshire average. Seacoast Mazda leads at 89. Updated Oct 24, 2026.
- Sites ranked
- 9
- Average score
- 83
- +3 vs New Hampshire (80)
- Scoring good
- 67%
- 6 sites above 80
- Top score
- 89
- Seacoast Mazda
Dealership websites in Portsmouth
| RANK | DEALERSHIP | SCORE |
|---|---|---|
| 1 | 89 | |
| 2 | 88 | |
| 3 | 87 | |
| 4 | 86 | |
| 5 | 83 | |
| 6 | 81 | |
| 7 | 79 | |
| 8 | 79 | |
| 9 | 76 |
The Portsmouth market
Website providers in Portsmouth
Bars show share of ranked sites; the number is each provider's average score.
Nearby cities
The closest cities with ranked dealership websites.
More cities in New Hampshire
How the rankings work
Each website's score (0–100) comes from Google's Chrome UX Report — what real Chrome users experienced over a roughly 28-day window. It weights five field metrics at the 75th percentile: Largest Contentful Paint, Cumulative Layout Shift, Interaction to Next Paint, First Contentful Paint and Time to First Byte. Above 80 is good, 61–80 needs improvement, 60 or less is poor.
It measures website performance, not a dealership's sales or service. Active dealership websites with enough Chrome traffic to be measured are ranked; the rest aren't scored rather than scored low.