# Optima RedTop 34/78 (8004-003) vs Interstate MTX-94R/H7 AGM: specs and price compared

A sourced, side-by-side comparison of the Optima RedTop 34/78 (8004-003) (Optima Batteries) and Interstate MTX-94R/H7 AGM (Interstate Batteries) among car batteries. Interstate MTX-94R/H7 AGM is the cheaper of the two at $274.95.

## Side by side

| Spec | Optima RedTop 34/78 (8004-003) | Interstate MTX-94R/H7 AGM |
| --- | --- | --- |
| US price | $279.99 | $274.95 |
| Brand | Optima Batteries | Interstate Batteries |
| Battery type | spiral-wound-AGM | AGM |
| Bci group size | 34/78 | 94R/H7 |
| Cold cranking amps | 800 | 850 |
| Cranking amps ca | — | 1000 |
| Reserve capacity min | 100 | 140 |
| Capacity ah | 50 | 80 |
| Terminal type | dual | top-post |
| Weight (lb) | 38.8 | — |
| Warranty months | 36 | 36 |
| Maintenance free | Yes | — |
| Dimensions inches | 10.06 x 6.94 x 7.88 | 12 7/16 x 6 15/16 x 7 1/2 |

## Key differences

- Battery type: Optima RedTop 34/78 (8004-003) spiral-wound-AGM vs Interstate MTX-94R/H7 AGM AGM
- Bci group size: Optima RedTop 34/78 (8004-003) 34/78 vs Interstate MTX-94R/H7 AGM 94R/H7
- Cold cranking amps: Optima RedTop 34/78 (8004-003) 800 vs Interstate MTX-94R/H7 AGM 850
- Reserve capacity min: Optima RedTop 34/78 (8004-003) 100 vs Interstate MTX-94R/H7 AGM 140
- Capacity ah: Optima RedTop 34/78 (8004-003) 50 vs Interstate MTX-94R/H7 AGM 80
- Terminal type: Optima RedTop 34/78 (8004-003) dual vs Interstate MTX-94R/H7 AGM top-post
- Dimensions inches: Optima RedTop 34/78 (8004-003) 10.06 x 6.94 x 7.88 vs Interstate MTX-94R/H7 AGM 12 7/16 x 6 15/16 x 7 1/2

## What reviewers say

**Optima RedTop 34/78 (8004-003)** — Only one whitelisted tester covers this battery. Pro Tool Reviews names the Optima RedTop its best-value AGM pick, praising reliability, longevity and vibration resistance while flagging a lower CCA rating than pricier rivals. This is a qualitative buying-guide verdict for the RedTop line (which includes the 34/78), not a bench test of the 8004-003, and no whitelisted outlet published measured lab numbers for this exact model. (1 sourced review.)

## Sources

- Optima RedTop 34/78 (8004-003): https://www.optimabatteries.com/products/redtop-34-78 (optimabatteries.com, verified 2026-07-13)
- Interstate MTX-94R/H7 AGM: https://www.interstatebatteries.com/products/mtx-94r/h7 (interstatebatteries.com, verified 2026-07-13)

Canonical: https://frontdeskreview.com/gear/car-batteries/optima-redtop-34-78-vs-interstate-mtx-94r-h7/
Cite: Per The Front Desk Review, Optima RedTop 34/78 (8004-003) ($279.99) vs Interstate MTX-94R/H7 AGM ($274.95) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-batteries/optima-redtop-34-78-vs-interstate-mtx-94r-h7/
License: CC BY 4.0.