# Optima RedTop 34/78 (8004-003) vs ACDelco 48AGM Professional AGM: specs and price compared

A sourced, side-by-side comparison of the Optima RedTop 34/78 (8004-003) (Optima Batteries) and ACDelco 48AGM Professional AGM (ACDelco) among car batteries. ACDelco 48AGM Professional AGM is the cheaper of the two at $183.99.

## Side by side

| Spec | Optima RedTop 34/78 (8004-003) | ACDelco 48AGM Professional AGM |
| --- | --- | --- |
| US price | $279.99 | $183.99 |
| Brand | Optima Batteries | ACDelco |
| Battery type | spiral-wound-AGM | AGM |
| Bci group size | 34/78 | 48 |
| Cold cranking amps | 800 | 760 |
| Cranking amps ca | — | 880 |
| Reserve capacity min | 100 | 120 |
| Capacity ah | 50 | 70 |
| Terminal type | dual | top-post |
| Weight (lb) | 38.8 | 46.88 |
| Warranty months | 36 | 36 |
| Maintenance free | Yes | Yes |
| Dimensions inches | 10.06 x 6.94 x 7.88 | 10.9 x 6.9 x 7.5 |

## Key differences

- Battery type: Optima RedTop 34/78 (8004-003) spiral-wound-AGM vs ACDelco 48AGM Professional AGM AGM
- Bci group size: Optima RedTop 34/78 (8004-003) 34/78 vs ACDelco 48AGM Professional AGM 48
- Cold cranking amps: Optima RedTop 34/78 (8004-003) 800 vs ACDelco 48AGM Professional AGM 760
- Reserve capacity min: Optima RedTop 34/78 (8004-003) 100 vs ACDelco 48AGM Professional AGM 120
- Capacity ah: Optima RedTop 34/78 (8004-003) 50 vs ACDelco 48AGM Professional AGM 70
- Terminal type: Optima RedTop 34/78 (8004-003) dual vs ACDelco 48AGM Professional AGM top-post
- Weight (lb): Optima RedTop 34/78 (8004-003) 38.8 vs ACDelco 48AGM Professional AGM 46.88
- Dimensions inches: Optima RedTop 34/78 (8004-003) 10.06 x 6.94 x 7.88 vs ACDelco 48AGM Professional AGM 10.9 x 6.9 x 7.5

## 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)
- ACDelco 48AGM Professional AGM: https://www.scwholesalebatteries.com/products/acdelco-48agm (scwholesalebatteries.com, verified 2026-07-13)

Canonical: https://frontdeskreview.com/gear/car-batteries/optima-redtop-34-78-vs-acdelco-48agm/
Cite: Per The Front Desk Review, Optima RedTop 34/78 (8004-003) ($279.99) vs ACDelco 48AGM Professional AGM ($183.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-batteries/optima-redtop-34-78-vs-acdelco-48agm/
License: CC BY 4.0.