We scored 10 Miele, 16 AEG, 19 Siemens and 16 Bosch washing machines using the WAC Score — the same data-driven framework applied to all nearly 500 machines in our database. Here is what spending £900 to £1,700 actually buys you.
The question comes up constantly: is Miele actually better? Is AEG worth the extra £300 over LG? Does spending £1,200 on a Siemens buy you a meaningfully superior washing machine?
Most buying guides sidestep this question. They list the features, note that Miele has a 20-year design life claim, and leave the conclusion to you. We have taken a different approach. We scored every prestige brand machine in our nearly 500 machine database using the same four-dimension WAC Score framework applied to every other machine — reliability, efficiency, features and value. The results are not what most people expect.
The WAC Score combines four sub-scores into a single number between 55 and 92 within each price band. The four dimensions are:
Scores are normalised within the premium price band (£650+). A score of 80 here means the machine sits in the upper half of the premium tier — it does not mean 80 out of 100 in an absolute sense.
What this analysis cannot measure: WAC Score is a point-in-time measure based on current data. It does not directly measure long-term machine lifespan, repairability, or parts availability over a 15–20 year ownership period. Where these factors are relevant — particularly for Miele — we note them clearly.
| Brand | Models scored | Price range | Avg WAC Score | Top WAC Score |
|---|---|---|---|---|
| LG | 13 | £679–£799 | 83.8 | 90 |
| Samsung | 15 | £679–£944 | 84.0 | 88 |
| Bosch | 16 | £679–£999 | 78.4 | 87 |
| Miele | 10 | £849–£1,699 | 80.6 | 86 |
| AEG | 16 | £669–£1,149 | 78.1 | 83 |
| Siemens | 19 | £699–£1,099 | 75.6 | 81 |
| Smeg | 2 | £779–£779 | 55.0 | 55 |
The headline finding: LG and Samsung lead the premium tier on average WAC Score at prices starting from £679. Miele, AEG and Siemens — the brands most associated with premium washing machines — score lower on average and reach lower maximum scores, at higher prices.
Miele's reliability score of 86 on the WEB365 WCS is the strongest argument for the brand — and it is genuine. Miele machines score consistently well on reliability across the range. Their customer review data supports a quality-first manufacturing approach that has been built over decades. This is not brand perception; it shows up in the numbers.
The uncomfortable data point: Miele's features scores are consistently the lowest of any prestige brand. The best-scoring Miele model (WEB365 WCS, £899, 8kg) has a features score of 27. A machine at this price with a features score of 27 means Miele is not investing in programme variety or smart features — it is investing in build quality and longevity. That is a legitimate choice, but you should know you are making it.
The most striking finding in the Miele range: the £1,699 PowerWash TwinDos (WAC Score 85) scores lower than the £899 WEB365 WCS (WAC Score 86). You pay £800 more and get a lower overall score. The PowerWash does have 1600rpm spin speed and an exceptional efficiency score of 97 — the highest in the premium database — plus auto-dosing. But on the composite WAC Score, the cheaper Miele machine wins.
When Miele makes sense: If machine longevity over a 15–20 year ownership period is your primary consideration, and you are prepared to pay for build quality that outlasts typical ownership cycles, Miele's reliability score is the data-backed argument. The 20-year design life claim is not something WAC Score can verify — but a reliability score of 86 is the strongest in the prestige category and consistent across models.
AEG's features score of 24 is the most consistent finding across all 16 models in our database — and the lowest average features score of any brand in the premium tier. This is not a single underperforming model; it is a brand-wide pattern. AEG machines focus on efficiency and build quality rather than programme variety. Every model in our database scores between 24 and 24 on features — there is almost no variation.
The best-scoring AEG models are the ProSteam range at £699–£726. These include steam, score 83 on WAC Score, and offer a reliability score of 80–81. AEG's ProSteam machines are the only models in the range where the features score (24) is offset by genuine steam functionality. If you are considering AEG, the ProSteam models at the lower end of the price range represent the best data-backed choice within the brand.
AEG's premium pricing (up to £1,149) is difficult to justify on the data alone. The top WAC Score of 83 is achievable at £699 — spending more within the AEG range does not buy a better-scoring machine.
AEG in summary: A reliable, efficient brand with a consistent focus on build quality over features. The data does not support spending above £726 within the AEG range — the top score is reached at the entry price.
Bosch is the most competitive prestige brand in our data. The Series 8 WGB256A2GB scores 87 on WAC Score at £879 — the highest of any prestige brand in our database and included in our best premium washing machines guide at position 5. Reliability score of 84, efficiency score of 93. Bosch's engineering credentials at this price point are real and reflected in the data.
The i-Dos finding deserves specific attention. The Bosch Series 8 i-Dos (£999) with auto-dosing scores 82 on WAC Score — five points lower than the £879 model without it. The i-Dos is a genuine convenience feature, but spending £120 more for it produces a lower WAC Score because the value sub-score falls. If you specifically want auto-dosing and are set on Bosch, the i-Dos is a legitimate choice — but go in knowing the data does not support the price premium.
Across the Bosch range, the pattern is consistent: the cheaper models in the Series 8 perform better on WAC Score than the more expensive variants. The sweet spot is the £879 model.
Bosch in summary: The most data-efficient prestige brand. The Series 8 at £879 is a genuine, high-reliability machine at a competitive premium price. Don't upgrade to i-Dos unless auto-dosing is a specific requirement — the numbers don't support it.
Siemens has the largest model count and the lowest average WAC Score of any prestige brand in our database. The top score of 81 is below every machine in our premium top five. Across 19 models at £699–£1,099, the data does not present a compelling case for Siemens over LG, Samsung or Bosch at equivalent or lower prices.
Siemens and Bosch are both manufactured by BSH Hausgeräte and share significant engineering overlap. In our data, Bosch consistently outscores Siemens within equivalent price brackets. If you are drawn to the BSH family of brands for reliability reasons, the data supports Bosch over Siemens at every price point.
Siemens in summary: The weakest performer of the traditional prestige brands on our data. At equivalent prices, Bosch scores higher and LG scores higher. There is no specific scenario where our data supports choosing Siemens over an available alternative.
Smeg's two machines in our database average a WAC Score of 55 — the lowest of any brand in the premium tier and the minimum display score in our system. Smeg washing machines are bought primarily for aesthetics — the retro design and colour range are genuinely distinctive. The data says nothing about whether a Smeg machine looks good in your kitchen. It says clearly that on reliability, efficiency, features and value, you are paying a very large premium for the design.
LG scores 90 on WAC Score at £749 with a reliability score of 88 — the strongest in the premium database. Samsung scores 88 at £679 with a reliability score of 87. These machines deliver genuine premium performance at competitive premium prices. Spending here buys a step-change in reliability score over the mid-range tier, and running costs that are among the lowest in the database (LG at 22 kWh per 100 cycles). This is where premium price and premium performance align most closely on the data.
Miele at £849–£899 is justified if machine longevity over 15–20 years is your primary consideration. The reliability score of 86 is real. You are buying build quality and a design life claim that the data supports in the short term. Bosch Series 8 at £879 is a well-scored, genuinely reliable machine — a step below LG on WAC Score but a legitimate prestige purchase for buyers who specifically want Bosch's engineering credentials. Both are rational choices for the right buyer. Neither beats LG or Samsung on the data.
AEG's top WAC Score is reached at £699–£726. Spending more within the AEG range does not buy a better score. Siemens underperforms Bosch at every equivalent price point. Miele above £999 — including the £1,699 PowerWash — scores lower on WAC Score than Miele at £899. You are paying for features (1600rpm, TwinDos auto-dosing) that do not offset the value score penalty at those prices. The data does not support these purchases on performance grounds alone.
Miele claim their machines are designed for 20 years of use — equivalent to 10,000 operating hours. Our WAC Score measures current reliability scores derived from customer reviews, not long-term lifespan. A reliability score of 86 is the strongest in the prestige category and suggests quality manufacturing. Whether that translates to a 20-year lifespan in practice depends on usage intensity and maintenance. Miele also offers better parts availability and service coverage than most brands over extended ownership periods — a real advantage that WAC Score does not capture.
AEG's features score consistently comes in at 24 across all 16 models in our database. This reflects a limited programme range and minimal smart features at prices from £669 to £1,149. AEG's design philosophy prioritises efficiency and build quality over programme variety. The ProSteam models include steam, which is the one exception, but the overall programme set remains narrow compared to Hisense, LG or even Samsung at lower prices.
On our data, yes — consistently. Both brands are manufactured by BSH Hausgeräte and share engineering heritage. Within our premium database, Bosch outscores Siemens at equivalent price points across both average WAC Score (78.4 vs 75.6) and top WAC Score (87 vs 81). If you are choosing between Bosch and Siemens, the data supports Bosch.
On WAC Score alone, yes — LG scores higher (90 vs 86 peak) at a lower price (£749 vs £899). If the decision is purely based on current reliability scores, efficiency and value, LG is the stronger choice. If you weight long-term ownership cost, repairability and the 20-year lifespan argument, Miele becomes more competitive. These are different decisions. The data supports LG for a 5–10 year ownership horizon. Miele becomes more compelling if you plan to keep the machine for 15–20 years and value Miele's service infrastructure over that period.
Three things worth knowing about: First, long-term lifespan — our reliability score measures current customer satisfaction data, not how machines perform after 10 or 15 years. Second, repairability — Miele in particular has better parts availability and engineer coverage than most brands over extended periods, which has real value. Third, build materials — premium brands often use higher-grade stainless steel drums, better seals and more robust bearings. These differences show up in reliability scores over time but may not be fully captured in our current dataset.
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